diff --git a/frostfsid/client/client.go b/frostfsid/client/client.go
index e92fa33..570df8a 100644
--- a/frostfsid/client/client.go
+++ b/frostfsid/client/client.go
@@ -57,21 +57,26 @@ type (
 	}
 
 	Group struct {
+		ID        int64
 		Name      string
 		Namespace string
+		KV        map[string]string
 	}
 
 	GroupExtended struct {
+		ID            int64
 		Name          string
 		Namespace     string
+		KV            map[string]string
 		SubjectsCount int64
 	}
 )
 
 const (
-	SubjectIAMPathKey      = "iam-path"
-	SubjectCreatedTimeKey  = "ctime"
-	SubjectModifiedTimeKey = "mtime"
+	IAMPathKey         = "iam-path"
+	IAMARNKey          = "iam-arn"
+	IAMCreatedTimeKey  = "ctime"
+	IAMModifiedTimeKey = "mtime"
 )
 
 const iteratorBatchSize = 100
@@ -107,6 +112,10 @@ const (
 	createGroupMethod            = "createGroup"
 	getGroupMethod               = "getGroup"
 	getGroupExtendedMethod       = "getGroupExtended"
+	getGroupIDByNameMethod       = "getGroupIDByName"
+	setGroupNameMethod           = "setGroupName"
+	setGroupKVMethod             = "setGroupKV"
+	deleteGroupKVMethod          = "deleteGroupKV"
 	listGroupsMethod             = "listGroups"
 	addSubjectToGroupMethod      = "addSubjectToGroup"
 	removeSubjectFromGroupMethod = "removeSubjectFromGroup"
@@ -240,13 +249,13 @@ func (c Client) RemoveSubjectKeyCall(addr util.Uint160, key *keys.PublicKey) (me
 
 // SetSubjectKV updates subject kv map.
 // Must be invoked by contract owner.
-// You can use some predefined key constants: SubjectLoginKey, SubjectIAMPathKey, SubjectCreatedTimeKey, SubjectModifiedTimeKey.
+// You can use some predefined key constants: IAMPathKey, IAMARNKey, IAMCreatedTimeKey, IAMModifiedTimeKey.
 func (c Client) SetSubjectKV(addr util.Uint160, key, val string) (tx util.Uint256, vub uint32, err error) {
 	method, args := c.SetSubjectKVCall(addr, key, val)
 	return c.act.SendCall(c.contract, method, args...)
 }
 
-// SetSubjectKVCall provides args for SetSubjectLogin to use in commonclient.Transaction.
+// SetSubjectKVCall provides args for SetSubjectKV to use in commonclient.Transaction.
 func (c Client) SetSubjectKVCall(addr util.Uint160, key, val string) (method string, args []any) {
 	return setSubjectKVMethod, []any{addr, key, val}
 }
@@ -258,7 +267,7 @@ func (c Client) SetSubjectName(addr util.Uint160, name string) (tx util.Uint256,
 	return c.act.SendCall(c.contract, method, args...)
 }
 
-// SetSubjectNameCall provides args for SetSubjectLogin to use in commonclient.Transaction.
+// SetSubjectNameCall provides args for SetSubjectName to use in commonclient.Transaction.
 func (c Client) SetSubjectNameCall(addr util.Uint160, name string) (method string, args []any) {
 	return setSubjectNameMethod, []any{addr, name}
 }
@@ -270,7 +279,7 @@ func (c Client) DeleteSubjectKV(addr util.Uint160, key string) (tx util.Uint256,
 	return c.act.SendCall(c.contract, method, args...)
 }
 
-// DeleteSubjectKVCall provides args for SetSubjectLogin to use in commonclient.Transaction.
+// DeleteSubjectKVCall provides args for DeleteSubjectKV to use in commonclient.Transaction.
 func (c Client) DeleteSubjectKVCall(addr util.Uint160, key string) (method string, args []any) {
 	return deleteSubjectKVMethod, []any{addr, key}
 }
@@ -386,8 +395,8 @@ func (c Client) CreateGroupCall(namespace, group string) (method string, args []
 }
 
 // GetGroup gets group.
-func (c Client) GetGroup(namespace, group string) (*Group, error) {
-	items, err := unwrap.Array(c.act.Call(c.contract, getGroupMethod, namespace, group))
+func (c Client) GetGroup(namespace string, groupID int64) (*Group, error) {
+	items, err := unwrap.Array(c.act.Call(c.contract, getGroupMethod, namespace, groupID))
 	if err != nil {
 		return nil, err
 	}
@@ -396,8 +405,8 @@ func (c Client) GetGroup(namespace, group string) (*Group, error) {
 }
 
 // GetGroupExtended gets extended group.
-func (c Client) GetGroupExtended(namespace, group string) (*GroupExtended, error) {
-	items, err := unwrap.Array(c.act.Call(c.contract, getGroupExtendedMethod, namespace, group))
+func (c Client) GetGroupExtended(namespace string, groupID int64) (*GroupExtended, error) {
+	items, err := unwrap.Array(c.act.Call(c.contract, getGroupExtendedMethod, namespace, groupID))
 	if err != nil {
 		return nil, err
 	}
@@ -405,6 +414,48 @@ func (c Client) GetGroupExtended(namespace, group string) (*GroupExtended, error
 	return parseGroupExtended(items)
 }
 
+// SetGroupName updates subject name.
+// Must be invoked by contract owner.
+func (c Client) SetGroupName(namespace string, groupID int64, name string) (tx util.Uint256, vub uint32, err error) {
+	method, args := c.SetGroupNameCall(namespace, groupID, name)
+	return c.act.SendCall(c.contract, method, args...)
+}
+
+// SetGroupNameCall provides args for SetGroupName to use in commonclient.Transaction.
+func (c Client) SetGroupNameCall(namespace string, groupID int64, name string) (method string, args []any) {
+	return setGroupNameMethod, []any{namespace, groupID, name}
+}
+
+// SetGroupKV updates group kv map.
+// Must be invoked by contract owner.
+// You can use some predefined key constants: IAMPathKey, IAMARNKey, IAMCreatedTimeKey, IAMModifiedTimeKey.
+func (c Client) SetGroupKV(namespace string, groupID int64, key, val string) (tx util.Uint256, vub uint32, err error) {
+	method, args := c.SetGroupKVCall(namespace, groupID, key, val)
+	return c.act.SendCall(c.contract, method, args...)
+}
+
+// SetGroupKVCall provides args for SetGroupKV to use in commonclient.Transaction.
+func (c Client) SetGroupKVCall(namespace string, groupID int64, key, val string) (method string, args []any) {
+	return setGroupKVMethod, []any{namespace, groupID, key, val}
+}
+
+// DeleteGroupKV removes group kv map.
+// Must be invoked by contract owner.
+func (c Client) DeleteGroupKV(namespace string, groupID int64, key string) (tx util.Uint256, vub uint32, err error) {
+	method, args := c.DeleteGroupKVCall(namespace, groupID, key)
+	return c.act.SendCall(c.contract, method, args...)
+}
+
+// DeleteGroupKVCall provides args for DeleteGroupKV to use in commonclient.Transaction.
+func (c Client) DeleteGroupKVCall(namespace string, groupID int64, key string) (method string, args []any) {
+	return deleteGroupKVMethod, []any{namespace, groupID, key}
+}
+
+// GetGroupIDByName gets group id its name (namespace scope).
+func (c Client) GetGroupIDByName(namespace, groupName string) (int64, error) {
+	return unwrap.Int64(c.act.Call(c.contract, getGroupIDByNameMethod, namespace, groupName))
+}
+
 // ListGroups gets all groups in specific namespace.
 func (c Client) ListGroups(namespace string) ([]*Group, error) {
 	items, err := commonclient.ReadIteratorItems(c.act, iteratorBatchSize, c.contract, listGroupsMethod, namespace)
@@ -417,43 +468,43 @@ func (c Client) ListGroups(namespace string) ([]*Group, error) {
 
 // AddSubjectToGroup adds a new subject to group.
 // Must be invoked by contract owner.
-func (c Client) AddSubjectToGroup(addr util.Uint160, group string) (tx util.Uint256, vub uint32, err error) {
-	method, args := c.AddSubjectToGroupCall(addr, group)
+func (c Client) AddSubjectToGroup(addr util.Uint160, groupID int64) (tx util.Uint256, vub uint32, err error) {
+	method, args := c.AddSubjectToGroupCall(addr, groupID)
 	return c.act.SendCall(c.contract, method, args...)
 }
 
 // AddSubjectToGroupCall provides args for AddSubjectToGroup to use in commonclient.Transaction.
-func (c Client) AddSubjectToGroupCall(addr util.Uint160, group string) (method string, args []any) {
-	return addSubjectToGroupMethod, []any{addr, group}
+func (c Client) AddSubjectToGroupCall(addr util.Uint160, groupID int64) (method string, args []any) {
+	return addSubjectToGroupMethod, []any{addr, groupID}
 }
 
 // RemoveSubjectFromGroup removes subject from group.
 // Must be invoked by contract owner.
-func (c Client) RemoveSubjectFromGroup(addr util.Uint160, namespace, group string) (tx util.Uint256, vub uint32, err error) {
-	method, args := c.RemoveSubjectFromGroupCall(addr, namespace, group)
+func (c Client) RemoveSubjectFromGroup(addr util.Uint160, groupID int64) (tx util.Uint256, vub uint32, err error) {
+	method, args := c.RemoveSubjectFromGroupCall(addr, groupID)
 	return c.act.SendCall(c.contract, method, args...)
 }
 
 // RemoveSubjectFromGroupCall provides args for RemoveSubjectFromGroup to use in commonclient.Transaction.
-func (c Client) RemoveSubjectFromGroupCall(addr util.Uint160, namespace, group string) (method string, args []any) {
-	return removeSubjectFromGroupMethod, []any{addr, namespace, group}
+func (c Client) RemoveSubjectFromGroupCall(addr util.Uint160, groupID int64) (method string, args []any) {
+	return removeSubjectFromGroupMethod, []any{addr, groupID}
 }
 
 // ListGroupSubjects gets all subjects in specific group.
-func (c Client) ListGroupSubjects(namespace, group string) ([]util.Uint160, error) {
-	return unwrapArrayOfUint160(commonclient.ReadIteratorItems(c.act, iteratorBatchSize, c.contract, listGroupSubjectsMethod, namespace, group))
+func (c Client) ListGroupSubjects(namespace string, groupID int64) ([]util.Uint160, error) {
+	return unwrapArrayOfUint160(commonclient.ReadIteratorItems(c.act, iteratorBatchSize, c.contract, listGroupSubjectsMethod, namespace, groupID))
 }
 
 // DeleteGroup deletes group.
 // Must be invoked by contract owner.
-func (c Client) DeleteGroup(namespace, group string) (tx util.Uint256, vub uint32, err error) {
-	method, args := c.DeleteGroupCall(namespace, group)
+func (c Client) DeleteGroup(namespace string, groupID int64) (tx util.Uint256, vub uint32, err error) {
+	method, args := c.DeleteGroupCall(namespace, groupID)
 	return c.act.SendCall(c.contract, method, args...)
 }
 
 // DeleteGroupCall provides args for DeleteGroup to use in commonclient.Transaction.
-func (c Client) DeleteGroupCall(namespace, group string) (method string, args []any) {
-	return deleteGroupMethod, []any{namespace, group}
+func (c Client) DeleteGroupCall(namespace string, groupID int64) (method string, args []any) {
+	return deleteGroupMethod, []any{namespace, groupID}
 }
 
 // ListNonEmptyNamespaces gets namespaces that contain at least one subject.
@@ -484,6 +535,15 @@ func (c Client) Wait(tx util.Uint256, vub uint32, err error) (*state.AppExecResu
 	return c.act.Wait(tx, vub, err)
 }
 
+// ParseGroupID fetch groupID from stack after creating group method invocation.
+func (c Client) ParseGroupID(res *state.AppExecResult, err error) (int64, error) {
+	if err != nil {
+		return 0, err
+	}
+
+	return unwrap.Int64(makeResFromAppExec(res))
+}
+
 // ListNonEmptyGroups gets groups that contain at least one subject.
 func (c Client) ListNonEmptyGroups(namespace string) ([]string, error) {
 	groups, err := c.ListGroups(namespace)
@@ -494,7 +554,7 @@ func (c Client) ListNonEmptyGroups(namespace string) ([]string, error) {
 	var res []string
 
 	for _, group := range groups {
-		groupExt, err := c.GetGroupExtended(namespace, group.Name)
+		groupExt, err := c.GetGroupExtended(namespace, group.ID)
 		if err != nil {
 			return nil, err
 		}
@@ -522,6 +582,13 @@ func makeValidRes(item stackitem.Item) (*result.Invoke, error) {
 	}, nil
 }
 
+func makeResFromAppExec(res *state.AppExecResult) (*result.Invoke, error) {
+	return &result.Invoke{
+		Stack: res.Stack,
+		State: res.VMState.String(),
+	}, nil
+}
+
 func parseSubject(structArr []stackitem.Item) (*Subject, error) {
 	if len(structArr) < 5 {
 		return nil, errors.New("invalid response subject struct")
@@ -710,49 +777,73 @@ func parseNamespaces(items []stackitem.Item) ([]*Namespace, error) {
 }
 
 func parseGroup(structArr []stackitem.Item) (*Group, error) {
-	if len(structArr) < 2 {
+	if len(structArr) < 4 {
 		return nil, errors.New("invalid response group struct")
 	}
 
-	name, err := structArr[0].TryBytes()
+	groupID, err := structArr[0].TryInteger()
 	if err != nil {
 		return nil, err
 	}
 
-	namespace, err := structArr[1].TryBytes()
+	name, err := structArr[1].TryBytes()
+	if err != nil {
+		return nil, err
+	}
+
+	namespace, err := structArr[2].TryBytes()
+	if err != nil {
+		return nil, err
+	}
+
+	kvs, err := parseMap(structArr[3])
 	if err != nil {
 		return nil, err
 	}
 
 	return &Group{
+		ID:        groupID.Int64(),
 		Name:      string(name),
 		Namespace: string(namespace),
+		KV:        kvs,
 	}, nil
 }
 
 func parseGroupExtended(structArr []stackitem.Item) (*GroupExtended, error) {
-	if len(structArr) < 3 {
+	if len(structArr) < 5 {
 		return nil, errors.New("invalid response group extended struct")
 	}
 
-	name, err := structArr[0].TryBytes()
+	groupID, err := structArr[0].TryInteger()
 	if err != nil {
 		return nil, err
 	}
 
-	namespace, err := structArr[1].TryBytes()
+	name, err := structArr[1].TryBytes()
 	if err != nil {
 		return nil, err
 	}
 
-	subjectCount, err := structArr[2].TryInteger()
+	namespace, err := structArr[2].TryBytes()
+	if err != nil {
+		return nil, err
+	}
+
+	kvs, err := parseMap(structArr[3])
+	if err != nil {
+		return nil, err
+	}
+
+	subjectCount, err := structArr[4].TryInteger()
 	if err != nil {
 		return nil, err
 	}
 
 	return &GroupExtended{
+		ID:            groupID.Int64(),
 		Name:          string(name),
 		Namespace:     string(namespace),
+		KV:            kvs,
 		SubjectsCount: subjectCount.Int64(),
 	}, nil
 }
diff --git a/frostfsid/config.yml b/frostfsid/config.yml
index 90b7311..36d304d 100644
--- a/frostfsid/config.yml
+++ b/frostfsid/config.yml
@@ -65,25 +65,51 @@ events:
         type: String
       - name: group
         type: String
+  - name: SetGroupName
+    parameters:
+      - name: namespace
+        type: String
+      - name: groupID
+        type: Integer
+      - name: name
+        type: String
+  - name: SetGroupKV
+    parameters:
+      - name: namespace
+        type: String
+      - name: groupID
+        type: Integer
+      - name: key
+        type: String
+      - name: value
+        type: String
+  - name: DeleteGroupKV
+    parameters:
+      - name: namespace
+        type: String
+      - name: groupID
+        type: Integer
+      - name: key
+        type: String
   - name: AddSubjectToGroup
     parameters:
       - name: subjectAddress
         type: Hash160
       - name: namespace
         type: String
-      - name: group
-        type: String
+      - name: groupID
+        type: Integer
   - name: RemoveSubjectFromGroup
     parameters:
       - name: subjectAddress
         type: Hash160
       - name: namespace
         type: String
-      - name: group
-        type: String
+      - name: groupID
+        type: Integer
   - name: DeleteGroup
     parameters:
       - name: namespace
         type: String
-      - name: group
-        type: String
+      - name: groupID
+        type: Integer
diff --git a/frostfsid/frostfsid_contract.go b/frostfsid/frostfsid_contract.go
index 6d60b9a..f53bfb2 100644
--- a/frostfsid/frostfsid_contract.go
+++ b/frostfsid/frostfsid_contract.go
@@ -4,6 +4,7 @@ import (
 	"git.frostfs.info/TrueCloudLab/frostfs-contract/common"
 	"github.com/nspcc-dev/neo-go/pkg/interop"
 	"github.com/nspcc-dev/neo-go/pkg/interop/contract"
+	"github.com/nspcc-dev/neo-go/pkg/interop/convert"
 	"github.com/nspcc-dev/neo-go/pkg/interop/iterator"
 	"github.com/nspcc-dev/neo-go/pkg/interop/native/crypto"
 	"github.com/nspcc-dev/neo-go/pkg/interop/native/management"
@@ -41,13 +42,17 @@ type (
 	}
 
 	Group struct {
+		ID        int
 		Name      string
 		Namespace string
+		KV        map[string]string
 	}
 
 	GroupExtended struct {
+		ID            int
 		Name          string
 		Namespace     string
+		KV            map[string]string
 		SubjectsCount int
 	}
 )
@@ -61,6 +66,8 @@ const (
 	namespaceSubjectsNamesPrefix = 'l'
 	groupKeysPrefix              = 'g'
 	groupSubjectsKeysPrefix      = 'G'
+	groupCounterKey              = 'c'
+	namespaceGroupsNamesPrefix   = 'm'
 )
 
 func _deploy(data any, isUpdate bool) {
@@ -77,6 +84,8 @@ func _deploy(data any, isUpdate bool) {
 		storage.Put(ctx, ownerKey(owner), []byte{1})
 	}
 
+	storage.Put(ctx, groupCounterKey, 0)
+
 	runtime.Log("frostfsid contract initialized")
 }
 
@@ -560,7 +569,7 @@ func ListNamespaceSubjects(ns string) iterator.Iterator {
 	return storage.Find(ctx, namespaceSubjectPrefix(ns), storage.KeysOnly|storage.RemovePrefix)
 }
 
-func CreateGroup(ns, group string) {
+func CreateGroup(ns, group string) int {
 	ctx := storage.GetContext()
 	checkContractOwner(ctx)
 
@@ -577,23 +586,29 @@ func CreateGroup(ns, group string) {
 		panic("namespace not found")
 	}
 
+	groupCountID := storage.Get(ctx, groupCounterKey).(int)
+	groupCountID++
+	storage.Put(ctx, groupCounterKey, groupCountID)
+
 	gr := Group{
+		ID:        groupCountID,
 		Name:      group,
 		Namespace: ns,
 	}
-	gKey := groupKey(ns, group)
-	data = storage.Get(ctx, gKey).([]byte)
-	if data != nil {
-		panic("group already exists")
-	}
+
+	setNamespaceGroupName(ctx, gr)
+
+	gKey := groupKey(ns, groupCountID)
 	storage.Put(ctx, gKey, std.Serialize(gr))
 
 	runtime.Notify("CreateGroup", ns, group)
+
+	return groupCountID
 }
 
-func GetGroup(ns, group string) Group {
+func GetGroup(ns string, groupID int) Group {
 	ctx := storage.GetReadOnlyContext()
-	gKey := groupKey(ns, group)
+	gKey := groupKey(ns, groupID)
 	data := storage.Get(ctx, gKey).([]byte)
 	if data == nil {
 		panic("group not found")
@@ -602,9 +617,9 @@ func GetGroup(ns, group string) Group {
 	return std.Deserialize(data).(Group)
 }
 
-func GetGroupExtended(ns, group string) GroupExtended {
+func GetGroupExtended(ns string, groupID int) GroupExtended {
 	ctx := storage.GetReadOnlyContext()
-	gKey := groupKey(ns, group)
+	gKey := groupKey(ns, groupID)
 	data := storage.Get(ctx, gKey).([]byte)
 	if data == nil {
 		panic("group not found")
@@ -613,11 +628,13 @@ func GetGroupExtended(ns, group string) GroupExtended {
 	gr := std.Deserialize(data).(Group)
 
 	grExtended := GroupExtended{
+		ID:        gr.ID,
 		Name:      gr.Name,
 		Namespace: gr.Namespace,
+		KV:        gr.KV,
 	}
 
-	it := storage.Find(ctx, groupSubjectPrefix(ns, group), storage.KeysOnly)
+	it := storage.Find(ctx, groupSubjectPrefix(ns, groupID), storage.KeysOnly)
 	for iterator.Next(it) {
 		grExtended.SubjectsCount += 1
 	}
@@ -625,12 +642,85 @@ func GetGroupExtended(ns, group string) GroupExtended {
 	return grExtended
 }
 
+func GetGroupIDByName(ns, name string) int {
+	if ns == "" || name == "" {
+		panic("invalid namespace or name")
+	}
+
+	ctx := storage.GetReadOnlyContext()
+
+	nsGroupNameKey := namespaceGroupNameKey(ns, name)
+	groupIDRaw := storage.Get(ctx, nsGroupNameKey).([]byte)
+	if groupIDRaw == nil {
+		panic("group not found")
+	}
+
+	return std.Deserialize(groupIDRaw).(int)
+}
+
+func SetGroupName(ns string, groupID int, name string) {
+	ctx := storage.GetContext()
+	checkContractOwner(ctx)
+
+	gKey := groupKey(ns, groupID)
+	data := storage.Get(ctx, gKey).([]byte)
+	if data == nil {
+		panic("group not found")
+	}
+
+	gr := std.Deserialize(data).(Group)
+	oldName := gr.Name
+	gr.Name = name
+	storage.Put(ctx, gKey, std.Serialize(gr))
+
+	updateNamespaceGroupName(ctx, gr, oldName)
+
+	runtime.Notify("SetGroupName", ns, groupID, name)
+}
+
+func SetGroupKV(ns string, groupID int, key, val string) {
+	ctx := storage.GetContext()
+	checkContractOwner(ctx)
+
+	gKey := groupKey(ns, groupID)
+	data := storage.Get(ctx, gKey).([]byte)
+	if data == nil {
+		panic("group not found")
+	}
+
+	gr := std.Deserialize(data).(Group)
+	if gr.KV == nil {
+		gr.KV = map[string]string{}
+	}
+	gr.KV[key] = val
+
+	storage.Put(ctx, gKey, std.Serialize(gr))
+	runtime.Notify("SetGroupKV", ns, groupID, key, val)
+}
+
+func DeleteGroupKV(ns string, groupID int, key string) {
+	ctx := storage.GetContext()
+	checkContractOwner(ctx)
+
+	gKey := groupKey(ns, groupID)
+	data := storage.Get(ctx, gKey).([]byte)
+	if data == nil {
+		panic("group not found")
+	}
+
+	gr := std.Deserialize(data).(Group)
+	delete(gr.KV, key)
+
+	storage.Put(ctx, gKey, std.Serialize(gr))
+	runtime.Notify("DeleteGroupKV", ns, groupID, key)
+}
+
 func ListGroups(ns string) iterator.Iterator {
 	ctx := storage.GetReadOnlyContext()
 	return storage.Find(ctx, groupPrefix(ns), storage.ValuesOnly|storage.DeserializeValues)
 }
 
-func AddSubjectToGroup(addr interop.Hash160, group string) {
+func AddSubjectToGroup(addr interop.Hash160, groupID int) {
 	ctx := storage.GetContext()
 	checkContractOwner(ctx)
 
@@ -652,19 +742,19 @@ func AddSubjectToGroup(addr interop.Hash160, group string) {
 	nSubjKey := namespaceSubjectKey(subject.Namespace, addr)
 	storage.Put(ctx, nSubjKey, []byte{1})
 
-	gKey := groupKey(subject.Namespace, group)
+	gKey := groupKey(subject.Namespace, groupID)
 	data = storage.Get(ctx, gKey).([]byte)
 	if data == nil {
 		panic("group not found")
 	}
 
-	gsKey := groupSubjectKey(subject.Namespace, group, addr)
+	gsKey := groupSubjectKey(subject.Namespace, groupID, addr)
 	storage.Put(ctx, gsKey, []byte{1})
 
-	runtime.Notify("AddSubjectToGroup", addr, subject.Namespace, group)
+	runtime.Notify("AddSubjectToGroup", addr, subject.Namespace, groupID)
 }
 
-func RemoveSubjectFromGroup(addr interop.Hash160, ns, group string) {
+func RemoveSubjectFromGroup(addr interop.Hash160, groupID int) {
 	ctx := storage.GetContext()
 	checkContractOwner(ctx)
 
@@ -678,41 +768,50 @@ func RemoveSubjectFromGroup(addr interop.Hash160, ns, group string) {
 		panic("subject not found")
 	}
 
-	gKey := groupKey(ns, group)
+	subject := std.Deserialize(data).(Subject)
+	if subject.Namespace == "" {
+		panic("subject doesn't belong to any namespace")
+	}
+
+	gKey := groupKey(subject.Namespace, groupID)
 	data = storage.Get(ctx, gKey).([]byte)
 	if data == nil {
 		panic("group not found")
 	}
 
-	gsKey := groupSubjectKey(ns, group, addr)
+	gsKey := groupSubjectKey(subject.Namespace, groupID, addr)
 	storage.Delete(ctx, gsKey)
 
-	runtime.Notify("RemoveSubjectFromGroup", addr, ns, group)
+	runtime.Notify("RemoveSubjectFromGroup", addr, subject.Namespace, groupID)
 }
 
-func ListGroupSubjects(ns, group string) iterator.Iterator {
+func ListGroupSubjects(ns string, groupID int) iterator.Iterator {
 	ctx := storage.GetReadOnlyContext()
-	return storage.Find(ctx, groupSubjectPrefix(ns, group), storage.KeysOnly|storage.RemovePrefix)
+	return storage.Find(ctx, groupSubjectPrefix(ns, groupID), storage.KeysOnly|storage.RemovePrefix)
 }
 
-func DeleteGroup(ns, group string) {
+func DeleteGroup(ns string, groupID int) {
 	ctx := storage.GetContext()
 	checkContractOwner(ctx)
 
-	gKey := groupKey(ns, group)
+	gKey := groupKey(ns, groupID)
 	data := storage.Get(ctx, gKey).([]byte)
 	if data == nil {
 		panic("group not found")
 	}
+	gr := std.Deserialize(data).(Group)
+
 	storage.Delete(ctx, gKey)
 
-	it := storage.Find(ctx, groupSubjectPrefix(ns, group), storage.KeysOnly)
+	it := storage.Find(ctx, groupSubjectPrefix(ns, groupID), storage.KeysOnly)
 	for iterator.Next(it) {
 		gsKey := iterator.Value(it).([]byte)
 		storage.Delete(ctx, gsKey)
 	}
 
-	runtime.Notify("DeleteGroup", ns, group)
+	deleteNamespaceGroupName(ctx, ns, gr.Name)
+
+	runtime.Notify("DeleteGroup", ns, groupID)
 }
 
 func checkContractOwner(ctx storage.Context) {
@@ -770,6 +869,42 @@ func updateNamespaceSubjectName(ctx storage.Context, subj Subject, oldName strin
 	setNamespaceSubjectName(ctx, subj)
 }
 
+func updateNamespaceGroupName(ctx storage.Context, gr Group, oldName string) {
+	if gr.Name == oldName {
+		return
+	}
+
+	deleteNamespaceGroupName(ctx, gr.Namespace, oldName)
+	setNamespaceGroupName(ctx, gr)
+}
+
+func deleteNamespaceGroupName(ctx storage.Context, ns, grName string) {
+	if grName == "" {
+		return
+	}
+
+	nsGroupNameKey := namespaceGroupNameKey(ns, grName)
+	storage.Delete(ctx, nsGroupNameKey)
+}
+
+func setNamespaceGroupName(ctx storage.Context, gr Group) {
+	if gr.Name == "" {
+		return
+	}
+
+	nsGroupNameKey := namespaceGroupNameKey(gr.Namespace, gr.Name)
+	groupIDRaw := storage.Get(ctx, nsGroupNameKey).([]byte)
+	if groupIDRaw == nil {
+		storage.Put(ctx, nsGroupNameKey, std.Serialize(gr.ID))
+		return
+	}
+
+	groupID := std.Deserialize(groupIDRaw).(int)
+	if groupID != gr.ID {
+		panic("group name is not available in the current namespace")
+	}
+}
+
 func ownerKey(owner interop.Hash160) []byte {
 	return append([]byte{ownerKeysPrefix}, owner...)
 }
@@ -799,14 +934,14 @@ func namespaceKeyFromHash(ns []byte) []byte {
 	return append([]byte{namespaceKeysPrefix}, ns...)
 }
 
-func groupKey(ns, group string) []byte {
+func groupKey(ns string, groupID int) []byte {
 	prefix := groupPrefix(ns)
-	return append(prefix, ripemd160Hash(group)...)
+	return append(prefix, idToBytes(groupID)...)
 }
 
-func groupKeyFromHashes(nsHash, groupHash []byte) []byte {
+func groupKeyFromHashes(nsHash []byte, groupIDBytes []byte) []byte {
 	prefix := groupPrefixFromHash(nsHash)
-	return append(prefix, groupHash...)
+	return append(prefix, groupIDBytes...)
 }
 
 func groupPrefix(ns string) []byte {
@@ -837,8 +972,14 @@ func namespaceSubjectNameKey(ns, subjName string) []byte {
 	return append([]byte{namespaceSubjectsNamesPrefix}, append(nsHash, nameHash...)...)
 }
 
-func groupSubjectKey(ns, group string, addr interop.Hash160) []byte {
-	prefix := groupSubjectPrefix(ns, group)
+func namespaceGroupNameKey(ns, groupName string) []byte {
+	nsHash := ripemd160Hash(ns)
+	nameHash := ripemd160Hash(groupName)
+	return append([]byte{namespaceGroupsNamesPrefix}, append(nsHash, nameHash...)...)
+}
+
+func groupSubjectKey(ns string, groupID int, addr interop.Hash160) []byte {
+	prefix := groupSubjectPrefix(ns, groupID)
 	return append(prefix, addr...)
 }
 
@@ -847,12 +988,22 @@ func groupSubjectKeyFromHashes(nsHash, groupHash []byte, addr interop.Hash160) [
 	return append(prefix, addr...)
 }
 
-func groupSubjectPrefix(ns, group string) []byte {
+func groupSubjectPrefix(ns string, groupID int) []byte {
 	nsHash := ripemd160Hash(ns)
-	gHash := ripemd160Hash(group)
-	return groupSubjectPrefixFromHashes(nsHash, gHash)
+	return groupSubjectPrefixFromHashes(nsHash, idToBytes(groupID))
 }
 
-func groupSubjectPrefixFromHashes(nsHash, groupHash []byte) []byte {
-	return append([]byte{groupSubjectsKeysPrefix}, append(nsHash, groupHash...)...)
+func groupSubjectPrefixFromHashes(nsHash, groupIDBytes []byte) []byte {
+	return append([]byte{groupSubjectsKeysPrefix}, append(nsHash, groupIDBytes...)...)
+}
+
+// idToBytes converts i64 value to BE bytes. Panics if value is bigger than i64.
+func idToBytes(itemID int) []byte {
+	b := convert.ToBytes(itemID)
+	ln := len(b)
+	if ln > 8 {
+		panic("item ID exceeds 8 byte limit")
+	}
+	zeros := make([]byte, 8-ln)
+	return append(b, zeros...)
 }
diff --git a/rpcclient/frostfsid/client.go b/rpcclient/frostfsid/client.go
index 5367e76..99d04a2 100644
--- a/rpcclient/frostfsid/client.go
+++ b/rpcclient/frostfsid/client.go
@@ -81,24 +81,46 @@ type CreateGroupEvent struct {
 	Group     string
 }
 
+// SetGroupNameEvent represents "SetGroupName" event emitted by the contract.
+type SetGroupNameEvent struct {
+	Namespace string
+	GroupID   *big.Int
+	Name      string
+}
+
+// SetGroupKVEvent represents "SetGroupKV" event emitted by the contract.
+type SetGroupKVEvent struct {
+	Namespace string
+	GroupID   *big.Int
+	Key       string
+	Value     string
+}
+
+// DeleteGroupKVEvent represents "DeleteGroupKV" event emitted by the contract.
+type DeleteGroupKVEvent struct {
+	Namespace string
+	GroupID   *big.Int
+	Key       string
+}
+
 // AddSubjectToGroupEvent represents "AddSubjectToGroup" event emitted by the contract.
 type AddSubjectToGroupEvent struct {
 	SubjectAddress util.Uint160
 	Namespace      string
-	Group          string
+	GroupID        *big.Int
 }
 
 // RemoveSubjectFromGroupEvent represents "RemoveSubjectFromGroup" event emitted by the contract.
 type RemoveSubjectFromGroupEvent struct {
 	SubjectAddress util.Uint160
 	Namespace      string
-	Group          string
+	GroupID        *big.Int
 }
 
 // DeleteGroupEvent represents "DeleteGroup" event emitted by the contract.
 type DeleteGroupEvent struct {
 	Namespace string
-	Group     string
+	GroupID   *big.Int
 }
 
 // Invoker is used by ContractReader to call various safe methods.
@@ -193,23 +215,23 @@ func (c *Contract) AddSubjectKeyUnsigned(addr util.Uint160, key *keys.PublicKey)
 // AddSubjectToGroup creates a transaction invoking `addSubjectToGroup` method of the contract.
 // This transaction is signed and immediately sent to the network.
 // The values returned are its hash, ValidUntilBlock value and error if any.
-func (c *Contract) AddSubjectToGroup(addr util.Uint160, group string) (util.Uint256, uint32, error) {
-	return c.actor.SendCall(c.hash, "addSubjectToGroup", addr, group)
+func (c *Contract) AddSubjectToGroup(addr util.Uint160, groupID *big.Int) (util.Uint256, uint32, error) {
+	return c.actor.SendCall(c.hash, "addSubjectToGroup", addr, groupID)
 }
 
 // AddSubjectToGroupTransaction creates a transaction invoking `addSubjectToGroup` method of the contract.
 // This transaction is signed, but not sent to the network, instead it's
 // returned to the caller.
-func (c *Contract) AddSubjectToGroupTransaction(addr util.Uint160, group string) (*transaction.Transaction, error) {
-	return c.actor.MakeCall(c.hash, "addSubjectToGroup", addr, group)
+func (c *Contract) AddSubjectToGroupTransaction(addr util.Uint160, groupID *big.Int) (*transaction.Transaction, error) {
+	return c.actor.MakeCall(c.hash, "addSubjectToGroup", addr, groupID)
 }
 
 // AddSubjectToGroupUnsigned creates a transaction invoking `addSubjectToGroup` method of the contract.
 // This transaction is not signed, it's simply returned to the caller.
 // Any fields of it that do not affect fees can be changed (ValidUntilBlock,
 // Nonce), fee values (NetworkFee, SystemFee) can be increased as well.
-func (c *Contract) AddSubjectToGroupUnsigned(addr util.Uint160, group string) (*transaction.Transaction, error) {
-	return c.actor.MakeUnsignedCall(c.hash, "addSubjectToGroup", nil, addr, group)
+func (c *Contract) AddSubjectToGroupUnsigned(addr util.Uint160, groupID *big.Int) (*transaction.Transaction, error) {
+	return c.actor.MakeUnsignedCall(c.hash, "addSubjectToGroup", nil, addr, groupID)
 }
 
 // AddSubjectToNamespace creates a transaction invoking `addSubjectToNamespace` method of the contract.
@@ -303,23 +325,45 @@ func (c *Contract) CreateSubjectUnsigned(key *keys.PublicKey) (*transaction.Tran
 // DeleteGroup creates a transaction invoking `deleteGroup` method of the contract.
 // This transaction is signed and immediately sent to the network.
 // The values returned are its hash, ValidUntilBlock value and error if any.
-func (c *Contract) DeleteGroup(ns string, group string) (util.Uint256, uint32, error) {
-	return c.actor.SendCall(c.hash, "deleteGroup", ns, group)
+func (c *Contract) DeleteGroup(ns string, groupID *big.Int) (util.Uint256, uint32, error) {
+	return c.actor.SendCall(c.hash, "deleteGroup", ns, groupID)
 }
 
 // DeleteGroupTransaction creates a transaction invoking `deleteGroup` method of the contract.
 // This transaction is signed, but not sent to the network, instead it's
 // returned to the caller.
-func (c *Contract) DeleteGroupTransaction(ns string, group string) (*transaction.Transaction, error) {
-	return c.actor.MakeCall(c.hash, "deleteGroup", ns, group)
+func (c *Contract) DeleteGroupTransaction(ns string, groupID *big.Int) (*transaction.Transaction, error) {
+	return c.actor.MakeCall(c.hash, "deleteGroup", ns, groupID)
 }
 
 // DeleteGroupUnsigned creates a transaction invoking `deleteGroup` method of the contract.
 // This transaction is not signed, it's simply returned to the caller.
 // Any fields of it that do not affect fees can be changed (ValidUntilBlock,
 // Nonce), fee values (NetworkFee, SystemFee) can be increased as well.
-func (c *Contract) DeleteGroupUnsigned(ns string, group string) (*transaction.Transaction, error) {
-	return c.actor.MakeUnsignedCall(c.hash, "deleteGroup", nil, ns, group)
+func (c *Contract) DeleteGroupUnsigned(ns string, groupID *big.Int) (*transaction.Transaction, error) {
+	return c.actor.MakeUnsignedCall(c.hash, "deleteGroup", nil, ns, groupID)
+}
+
+// DeleteGroupKV creates a transaction invoking `deleteGroupKV` method of the contract.
+// This transaction is signed and immediately sent to the network.
+// The values returned are its hash, ValidUntilBlock value and error if any.
+func (c *Contract) DeleteGroupKV(ns string, groupID *big.Int, key string) (util.Uint256, uint32, error) {
+	return c.actor.SendCall(c.hash, "deleteGroupKV", ns, groupID, key)
+}
+
+// DeleteGroupKVTransaction creates a transaction invoking `deleteGroupKV` method of the contract.
+// This transaction is signed, but not sent to the network, instead it's
+// returned to the caller.
+func (c *Contract) DeleteGroupKVTransaction(ns string, groupID *big.Int, key string) (*transaction.Transaction, error) {
+	return c.actor.MakeCall(c.hash, "deleteGroupKV", ns, groupID, key)
+}
+
+// DeleteGroupKVUnsigned creates a transaction invoking `deleteGroupKV` method of the contract.
+// This transaction is not signed, it's simply returned to the caller.
+// Any fields of it that do not affect fees can be changed (ValidUntilBlock,
+// Nonce), fee values (NetworkFee, SystemFee) can be increased as well.
+func (c *Contract) DeleteGroupKVUnsigned(ns string, groupID *big.Int, key string) (*transaction.Transaction, error) {
+	return c.actor.MakeUnsignedCall(c.hash, "deleteGroupKV", nil, ns, groupID, key)
 }
 
 // DeleteOwner creates a transaction invoking `deleteOwner` method of the contract.
@@ -391,45 +435,67 @@ func (c *Contract) DeleteSubjectKVUnsigned(addr util.Uint160, key string) (*tran
 // GetGroup creates a transaction invoking `getGroup` method of the contract.
 // This transaction is signed and immediately sent to the network.
 // The values returned are its hash, ValidUntilBlock value and error if any.
-func (c *Contract) GetGroup(ns string, group string) (util.Uint256, uint32, error) {
-	return c.actor.SendCall(c.hash, "getGroup", ns, group)
+func (c *Contract) GetGroup(ns string, groupID *big.Int) (util.Uint256, uint32, error) {
+	return c.actor.SendCall(c.hash, "getGroup", ns, groupID)
 }
 
 // GetGroupTransaction creates a transaction invoking `getGroup` method of the contract.
 // This transaction is signed, but not sent to the network, instead it's
 // returned to the caller.
-func (c *Contract) GetGroupTransaction(ns string, group string) (*transaction.Transaction, error) {
-	return c.actor.MakeCall(c.hash, "getGroup", ns, group)
+func (c *Contract) GetGroupTransaction(ns string, groupID *big.Int) (*transaction.Transaction, error) {
+	return c.actor.MakeCall(c.hash, "getGroup", ns, groupID)
 }
 
 // GetGroupUnsigned creates a transaction invoking `getGroup` method of the contract.
 // This transaction is not signed, it's simply returned to the caller.
 // Any fields of it that do not affect fees can be changed (ValidUntilBlock,
 // Nonce), fee values (NetworkFee, SystemFee) can be increased as well.
-func (c *Contract) GetGroupUnsigned(ns string, group string) (*transaction.Transaction, error) {
-	return c.actor.MakeUnsignedCall(c.hash, "getGroup", nil, ns, group)
+func (c *Contract) GetGroupUnsigned(ns string, groupID *big.Int) (*transaction.Transaction, error) {
+	return c.actor.MakeUnsignedCall(c.hash, "getGroup", nil, ns, groupID)
 }
 
 // GetGroupExtended creates a transaction invoking `getGroupExtended` method of the contract.
 // This transaction is signed and immediately sent to the network.
 // The values returned are its hash, ValidUntilBlock value and error if any.
-func (c *Contract) GetGroupExtended(ns string, group string) (util.Uint256, uint32, error) {
-	return c.actor.SendCall(c.hash, "getGroupExtended", ns, group)
+func (c *Contract) GetGroupExtended(ns string, groupID *big.Int) (util.Uint256, uint32, error) {
+	return c.actor.SendCall(c.hash, "getGroupExtended", ns, groupID)
 }
 
 // GetGroupExtendedTransaction creates a transaction invoking `getGroupExtended` method of the contract.
 // This transaction is signed, but not sent to the network, instead it's
 // returned to the caller.
-func (c *Contract) GetGroupExtendedTransaction(ns string, group string) (*transaction.Transaction, error) {
-	return c.actor.MakeCall(c.hash, "getGroupExtended", ns, group)
+func (c *Contract) GetGroupExtendedTransaction(ns string, groupID *big.Int) (*transaction.Transaction, error) {
+	return c.actor.MakeCall(c.hash, "getGroupExtended", ns, groupID)
 }
 
 // GetGroupExtendedUnsigned creates a transaction invoking `getGroupExtended` method of the contract.
 // This transaction is not signed, it's simply returned to the caller.
 // Any fields of it that do not affect fees can be changed (ValidUntilBlock,
 // Nonce), fee values (NetworkFee, SystemFee) can be increased as well.
-func (c *Contract) GetGroupExtendedUnsigned(ns string, group string) (*transaction.Transaction, error) {
-	return c.actor.MakeUnsignedCall(c.hash, "getGroupExtended", nil, ns, group)
+func (c *Contract) GetGroupExtendedUnsigned(ns string, groupID *big.Int) (*transaction.Transaction, error) {
+	return c.actor.MakeUnsignedCall(c.hash, "getGroupExtended", nil, ns, groupID)
+}
+
+// GetGroupIDByName creates a transaction invoking `getGroupIDByName` method of the contract.
+// This transaction is signed and immediately sent to the network.
+// The values returned are its hash, ValidUntilBlock value and error if any.
+func (c *Contract) GetGroupIDByName(ns string, name string) (util.Uint256, uint32, error) {
+	return c.actor.SendCall(c.hash, "getGroupIDByName", ns, name)
+}
+
+// GetGroupIDByNameTransaction creates a transaction invoking `getGroupIDByName` method of the contract.
+// This transaction is signed, but not sent to the network, instead it's
+// returned to the caller.
+func (c *Contract) GetGroupIDByNameTransaction(ns string, name string) (*transaction.Transaction, error) {
+	return c.actor.MakeCall(c.hash, "getGroupIDByName", ns, name)
+}
+
+// GetGroupIDByNameUnsigned creates a transaction invoking `getGroupIDByName` method of the contract.
+// This transaction is not signed, it's simply returned to the caller.
+// Any fields of it that do not affect fees can be changed (ValidUntilBlock,
+// Nonce), fee values (NetworkFee, SystemFee) can be increased as well.
+func (c *Contract) GetGroupIDByNameUnsigned(ns string, name string) (*transaction.Transaction, error) {
+	return c.actor.MakeUnsignedCall(c.hash, "getGroupIDByName", nil, ns, name)
 }
 
 // GetNamespace creates a transaction invoking `getNamespace` method of the contract.
@@ -567,23 +633,23 @@ func (c *Contract) GetSubjectKeyByNameUnsigned(ns string, name string) (*transac
 // ListGroupSubjects creates a transaction invoking `listGroupSubjects` method of the contract.
 // This transaction is signed and immediately sent to the network.
 // The values returned are its hash, ValidUntilBlock value and error if any.
-func (c *Contract) ListGroupSubjects(ns string, group string) (util.Uint256, uint32, error) {
-	return c.actor.SendCall(c.hash, "listGroupSubjects", ns, group)
+func (c *Contract) ListGroupSubjects(ns string, groupID *big.Int) (util.Uint256, uint32, error) {
+	return c.actor.SendCall(c.hash, "listGroupSubjects", ns, groupID)
 }
 
 // ListGroupSubjectsTransaction creates a transaction invoking `listGroupSubjects` method of the contract.
 // This transaction is signed, but not sent to the network, instead it's
 // returned to the caller.
-func (c *Contract) ListGroupSubjectsTransaction(ns string, group string) (*transaction.Transaction, error) {
-	return c.actor.MakeCall(c.hash, "listGroupSubjects", ns, group)
+func (c *Contract) ListGroupSubjectsTransaction(ns string, groupID *big.Int) (*transaction.Transaction, error) {
+	return c.actor.MakeCall(c.hash, "listGroupSubjects", ns, groupID)
 }
 
 // ListGroupSubjectsUnsigned creates a transaction invoking `listGroupSubjects` method of the contract.
 // This transaction is not signed, it's simply returned to the caller.
 // Any fields of it that do not affect fees can be changed (ValidUntilBlock,
 // Nonce), fee values (NetworkFee, SystemFee) can be increased as well.
-func (c *Contract) ListGroupSubjectsUnsigned(ns string, group string) (*transaction.Transaction, error) {
-	return c.actor.MakeUnsignedCall(c.hash, "listGroupSubjects", nil, ns, group)
+func (c *Contract) ListGroupSubjectsUnsigned(ns string, groupID *big.Int) (*transaction.Transaction, error) {
+	return c.actor.MakeUnsignedCall(c.hash, "listGroupSubjects", nil, ns, groupID)
 }
 
 // ListGroups creates a transaction invoking `listGroups` method of the contract.
@@ -699,23 +765,23 @@ func (c *Contract) ListSubjectsUnsigned() (*transaction.Transaction, error) {
 // RemoveSubjectFromGroup creates a transaction invoking `removeSubjectFromGroup` method of the contract.
 // This transaction is signed and immediately sent to the network.
 // The values returned are its hash, ValidUntilBlock value and error if any.
-func (c *Contract) RemoveSubjectFromGroup(addr util.Uint160, ns string, group string) (util.Uint256, uint32, error) {
-	return c.actor.SendCall(c.hash, "removeSubjectFromGroup", addr, ns, group)
+func (c *Contract) RemoveSubjectFromGroup(addr util.Uint160, groupID *big.Int) (util.Uint256, uint32, error) {
+	return c.actor.SendCall(c.hash, "removeSubjectFromGroup", addr, groupID)
 }
 
 // RemoveSubjectFromGroupTransaction creates a transaction invoking `removeSubjectFromGroup` method of the contract.
 // This transaction is signed, but not sent to the network, instead it's
 // returned to the caller.
-func (c *Contract) RemoveSubjectFromGroupTransaction(addr util.Uint160, ns string, group string) (*transaction.Transaction, error) {
-	return c.actor.MakeCall(c.hash, "removeSubjectFromGroup", addr, ns, group)
+func (c *Contract) RemoveSubjectFromGroupTransaction(addr util.Uint160, groupID *big.Int) (*transaction.Transaction, error) {
+	return c.actor.MakeCall(c.hash, "removeSubjectFromGroup", addr, groupID)
 }
 
 // RemoveSubjectFromGroupUnsigned creates a transaction invoking `removeSubjectFromGroup` method of the contract.
 // This transaction is not signed, it's simply returned to the caller.
 // Any fields of it that do not affect fees can be changed (ValidUntilBlock,
 // Nonce), fee values (NetworkFee, SystemFee) can be increased as well.
-func (c *Contract) RemoveSubjectFromGroupUnsigned(addr util.Uint160, ns string, group string) (*transaction.Transaction, error) {
-	return c.actor.MakeUnsignedCall(c.hash, "removeSubjectFromGroup", nil, addr, ns, group)
+func (c *Contract) RemoveSubjectFromGroupUnsigned(addr util.Uint160, groupID *big.Int) (*transaction.Transaction, error) {
+	return c.actor.MakeUnsignedCall(c.hash, "removeSubjectFromGroup", nil, addr, groupID)
 }
 
 // RemoveSubjectFromNamespace creates a transaction invoking `removeSubjectFromNamespace` method of the contract.
@@ -762,6 +828,50 @@ func (c *Contract) RemoveSubjectKeyUnsigned(addr util.Uint160, key *keys.PublicK
 	return c.actor.MakeUnsignedCall(c.hash, "removeSubjectKey", nil, addr, key)
 }
 
+// SetGroupKV creates a transaction invoking `setGroupKV` method of the contract.
+// This transaction is signed and immediately sent to the network.
+// The values returned are its hash, ValidUntilBlock value and error if any.
+func (c *Contract) SetGroupKV(ns string, groupID *big.Int, key string, val string) (util.Uint256, uint32, error) {
+	return c.actor.SendCall(c.hash, "setGroupKV", ns, groupID, key, val)
+}
+
+// SetGroupKVTransaction creates a transaction invoking `setGroupKV` method of the contract.
+// This transaction is signed, but not sent to the network, instead it's
+// returned to the caller.
+func (c *Contract) SetGroupKVTransaction(ns string, groupID *big.Int, key string, val string) (*transaction.Transaction, error) {
+	return c.actor.MakeCall(c.hash, "setGroupKV", ns, groupID, key, val)
+}
+
+// SetGroupKVUnsigned creates a transaction invoking `setGroupKV` method of the contract.
+// This transaction is not signed, it's simply returned to the caller.
+// Any fields of it that do not affect fees can be changed (ValidUntilBlock,
+// Nonce), fee values (NetworkFee, SystemFee) can be increased as well.
+func (c *Contract) SetGroupKVUnsigned(ns string, groupID *big.Int, key string, val string) (*transaction.Transaction, error) {
+	return c.actor.MakeUnsignedCall(c.hash, "setGroupKV", nil, ns, groupID, key, val)
+}
+
+// SetGroupName creates a transaction invoking `setGroupName` method of the contract.
+// This transaction is signed and immediately sent to the network.
+// The values returned are its hash, ValidUntilBlock value and error if any.
+func (c *Contract) SetGroupName(ns string, groupID *big.Int, name string) (util.Uint256, uint32, error) {
+	return c.actor.SendCall(c.hash, "setGroupName", ns, groupID, name)
+}
+
+// SetGroupNameTransaction creates a transaction invoking `setGroupName` method of the contract.
+// This transaction is signed, but not sent to the network, instead it's
+// returned to the caller.
+func (c *Contract) SetGroupNameTransaction(ns string, groupID *big.Int, name string) (*transaction.Transaction, error) {
+	return c.actor.MakeCall(c.hash, "setGroupName", ns, groupID, name)
+}
+
+// SetGroupNameUnsigned creates a transaction invoking `setGroupName` method of the contract.
+// This transaction is not signed, it's simply returned to the caller.
+// Any fields of it that do not affect fees can be changed (ValidUntilBlock,
+// Nonce), fee values (NetworkFee, SystemFee) can be increased as well.
+func (c *Contract) SetGroupNameUnsigned(ns string, groupID *big.Int, name string) (*transaction.Transaction, error) {
+	return c.actor.MakeUnsignedCall(c.hash, "setGroupName", nil, ns, groupID, name)
+}
+
 // SetSubjectKV creates a transaction invoking `setSubjectKV` method of the contract.
 // This transaction is signed and immediately sent to the network.
 // The values returned are its hash, ValidUntilBlock value and error if any.
@@ -1645,6 +1755,267 @@ func (e *CreateGroupEvent) FromStackItem(item *stackitem.Array) error {
 	return nil
 }
 
+// SetGroupNameEventsFromApplicationLog retrieves a set of all emitted events
+// with "SetGroupName" name from the provided [result.ApplicationLog].
+func SetGroupNameEventsFromApplicationLog(log *result.ApplicationLog) ([]*SetGroupNameEvent, error) {
+	if log == nil {
+		return nil, errors.New("nil application log")
+	}
+
+	var res []*SetGroupNameEvent
+	for i, ex := range log.Executions {
+		for j, e := range ex.Events {
+			if e.Name != "SetGroupName" {
+				continue
+			}
+			event := new(SetGroupNameEvent)
+			err := event.FromStackItem(e.Item)
+			if err != nil {
+				return nil, fmt.Errorf("failed to deserialize SetGroupNameEvent from stackitem (execution #%d, event #%d): %w", i, j, err)
+			}
+			res = append(res, event)
+		}
+	}
+
+	return res, nil
+}
+
+// FromStackItem converts provided [stackitem.Array] to SetGroupNameEvent or
+// returns an error if it's not possible to do to so.
+func (e *SetGroupNameEvent) FromStackItem(item *stackitem.Array) error {
+	if item == nil {
+		return errors.New("nil item")
+	}
+	arr, ok := item.Value().([]stackitem.Item)
+	if !ok {
+		return errors.New("not an array")
+	}
+	if len(arr) != 3 {
+		return errors.New("wrong number of structure elements")
+	}
+
+	var (
+		index = -1
+		err   error
+	)
+	index++
+	e.Namespace, err = func(item stackitem.Item) (string, error) {
+		b, err := item.TryBytes()
+		if err != nil {
+			return "", err
+		}
+		if !utf8.Valid(b) {
+			return "", errors.New("not a UTF-8 string")
+		}
+		return string(b), nil
+	}(arr[index])
+	if err != nil {
+		return fmt.Errorf("field Namespace: %w", err)
+	}
+
+	index++
+	e.GroupID, err = arr[index].TryInteger()
+	if err != nil {
+		return fmt.Errorf("field GroupID: %w", err)
+	}
+
+	index++
+	e.Name, err = func(item stackitem.Item) (string, error) {
+		b, err := item.TryBytes()
+		if err != nil {
+			return "", err
+		}
+		if !utf8.Valid(b) {
+			return "", errors.New("not a UTF-8 string")
+		}
+		return string(b), nil
+	}(arr[index])
+	if err != nil {
+		return fmt.Errorf("field Name: %w", err)
+	}
+
+	return nil
+}
+
+// SetGroupKVEventsFromApplicationLog retrieves a set of all emitted events
+// with "SetGroupKV" name from the provided [result.ApplicationLog].
+func SetGroupKVEventsFromApplicationLog(log *result.ApplicationLog) ([]*SetGroupKVEvent, error) {
+	if log == nil {
+		return nil, errors.New("nil application log")
+	}
+
+	var res []*SetGroupKVEvent
+	for i, ex := range log.Executions {
+		for j, e := range ex.Events {
+			if e.Name != "SetGroupKV" {
+				continue
+			}
+			event := new(SetGroupKVEvent)
+			err := event.FromStackItem(e.Item)
+			if err != nil {
+				return nil, fmt.Errorf("failed to deserialize SetGroupKVEvent from stackitem (execution #%d, event #%d): %w", i, j, err)
+			}
+			res = append(res, event)
+		}
+	}
+
+	return res, nil
+}
+
+// FromStackItem converts provided [stackitem.Array] to SetGroupKVEvent or
+// returns an error if it's not possible to do to so.
+func (e *SetGroupKVEvent) FromStackItem(item *stackitem.Array) error {
+	if item == nil {
+		return errors.New("nil item")
+	}
+	arr, ok := item.Value().([]stackitem.Item)
+	if !ok {
+		return errors.New("not an array")
+	}
+	if len(arr) != 4 {
+		return errors.New("wrong number of structure elements")
+	}
+
+	var (
+		index = -1
+		err   error
+	)
+	index++
+	e.Namespace, err = func(item stackitem.Item) (string, error) {
+		b, err := item.TryBytes()
+		if err != nil {
+			return "", err
+		}
+		if !utf8.Valid(b) {
+			return "", errors.New("not a UTF-8 string")
+		}
+		return string(b), nil
+	}(arr[index])
+	if err != nil {
+		return fmt.Errorf("field Namespace: %w", err)
+	}
+
+	index++
+	e.GroupID, err = arr[index].TryInteger()
+	if err != nil {
+		return fmt.Errorf("field GroupID: %w", err)
+	}
+
+	index++
+	e.Key, err = func(item stackitem.Item) (string, error) {
+		b, err := item.TryBytes()
+		if err != nil {
+			return "", err
+		}
+		if !utf8.Valid(b) {
+			return "", errors.New("not a UTF-8 string")
+		}
+		return string(b), nil
+	}(arr[index])
+	if err != nil {
+		return fmt.Errorf("field Key: %w", err)
+	}
+
+	index++
+	e.Value, err = func(item stackitem.Item) (string, error) {
+		b, err := item.TryBytes()
+		if err != nil {
+			return "", err
+		}
+		if !utf8.Valid(b) {
+			return "", errors.New("not a UTF-8 string")
+		}
+		return string(b), nil
+	}(arr[index])
+	if err != nil {
+		return fmt.Errorf("field Value: %w", err)
+	}
+
+	return nil
+}
+
+// DeleteGroupKVEventsFromApplicationLog retrieves a set of all emitted events
+// with "DeleteGroupKV" name from the provided [result.ApplicationLog].
+func DeleteGroupKVEventsFromApplicationLog(log *result.ApplicationLog) ([]*DeleteGroupKVEvent, error) {
+	if log == nil {
+		return nil, errors.New("nil application log")
+	}
+
+	var res []*DeleteGroupKVEvent
+	for i, ex := range log.Executions {
+		for j, e := range ex.Events {
+			if e.Name != "DeleteGroupKV" {
+				continue
+			}
+			event := new(DeleteGroupKVEvent)
+			err := event.FromStackItem(e.Item)
+			if err != nil {
+				return nil, fmt.Errorf("failed to deserialize DeleteGroupKVEvent from stackitem (execution #%d, event #%d): %w", i, j, err)
+			}
+			res = append(res, event)
+		}
+	}
+
+	return res, nil
+}
+
+// FromStackItem converts provided [stackitem.Array] to DeleteGroupKVEvent or
+// returns an error if it's not possible to do to so.
+func (e *DeleteGroupKVEvent) FromStackItem(item *stackitem.Array) error {
+	if item == nil {
+		return errors.New("nil item")
+	}
+	arr, ok := item.Value().([]stackitem.Item)
+	if !ok {
+		return errors.New("not an array")
+	}
+	if len(arr) != 3 {
+		return errors.New("wrong number of structure elements")
+	}
+
+	var (
+		index = -1
+		err   error
+	)
+	index++
+	e.Namespace, err = func(item stackitem.Item) (string, error) {
+		b, err := item.TryBytes()
+		if err != nil {
+			return "", err
+		}
+		if !utf8.Valid(b) {
+			return "", errors.New("not a UTF-8 string")
+		}
+		return string(b), nil
+	}(arr[index])
+	if err != nil {
+		return fmt.Errorf("field Namespace: %w", err)
+	}
+
+	index++
+	e.GroupID, err = arr[index].TryInteger()
+	if err != nil {
+		return fmt.Errorf("field GroupID: %w", err)
+	}
+
+	index++
+	e.Key, err = func(item stackitem.Item) (string, error) {
+		b, err := item.TryBytes()
+		if err != nil {
+			return "", err
+		}
+		if !utf8.Valid(b) {
+			return "", errors.New("not a UTF-8 string")
+		}
+		return string(b), nil
+	}(arr[index])
+	if err != nil {
+		return fmt.Errorf("field Key: %w", err)
+	}
+
+	return nil
+}
+
 // AddSubjectToGroupEventsFromApplicationLog retrieves a set of all emitted events
 // with "AddSubjectToGroup" name from the provided [result.ApplicationLog].
 func AddSubjectToGroupEventsFromApplicationLog(log *result.ApplicationLog) ([]*AddSubjectToGroupEvent, error) {
@@ -1720,18 +2091,9 @@ func (e *AddSubjectToGroupEvent) FromStackItem(item *stackitem.Array) error {
 	}
 
 	index++
-	e.Group, err = func(item stackitem.Item) (string, error) {
-		b, err := item.TryBytes()
-		if err != nil {
-			return "", err
-		}
-		if !utf8.Valid(b) {
-			return "", errors.New("not a UTF-8 string")
-		}
-		return string(b), nil
-	}(arr[index])
+	e.GroupID, err = arr[index].TryInteger()
 	if err != nil {
-		return fmt.Errorf("field Group: %w", err)
+		return fmt.Errorf("field GroupID: %w", err)
 	}
 
 	return nil
@@ -1812,18 +2174,9 @@ func (e *RemoveSubjectFromGroupEvent) FromStackItem(item *stackitem.Array) error
 	}
 
 	index++
-	e.Group, err = func(item stackitem.Item) (string, error) {
-		b, err := item.TryBytes()
-		if err != nil {
-			return "", err
-		}
-		if !utf8.Valid(b) {
-			return "", errors.New("not a UTF-8 string")
-		}
-		return string(b), nil
-	}(arr[index])
+	e.GroupID, err = arr[index].TryInteger()
 	if err != nil {
-		return fmt.Errorf("field Group: %w", err)
+		return fmt.Errorf("field GroupID: %w", err)
 	}
 
 	return nil
@@ -1888,18 +2241,9 @@ func (e *DeleteGroupEvent) FromStackItem(item *stackitem.Array) error {
 	}
 
 	index++
-	e.Group, err = func(item stackitem.Item) (string, error) {
-		b, err := item.TryBytes()
-		if err != nil {
-			return "", err
-		}
-		if !utf8.Valid(b) {
-			return "", errors.New("not a UTF-8 string")
-		}
-		return string(b), nil
-	}(arr[index])
+	e.GroupID, err = arr[index].TryInteger()
 	if err != nil {
-		return fmt.Errorf("field Group: %w", err)
+		return fmt.Errorf("field GroupID: %w", err)
 	}
 
 	return nil
diff --git a/tests/frostfsid_client_test.go b/tests/frostfsid_client_test.go
index 1122545..d6bd9ed 100644
--- a/tests/frostfsid_client_test.go
+++ b/tests/frostfsid_client_test.go
@@ -114,17 +114,17 @@ func TestFrostFSID_Client_SubjectManagement(t *testing.T) {
 
 	ffsid.a.await(ffsid.cli.CreateSubject(subjKey.PublicKey()))
 	ffsid.a.await(ffsid.cli.SetSubjectName(subjAddr, subjLogin))
-	ffsid.a.await(ffsid.cli.SetSubjectKV(subjAddr, client.SubjectIAMPathKey, iamPathKV))
+	ffsid.a.await(ffsid.cli.SetSubjectKV(subjAddr, client.IAMPathKey, iamPathKV))
 	ffsid.a.await(ffsid.cli.AddSubjectKey(subjAddr, extraKey.PublicKey()))
 
 	subj, err := ffsid.cli.GetSubject(subjAddr)
 	require.NoError(t, err)
 	require.True(t, subjKey.PublicKey().Equal(subj.PrimaryKey))
 	require.Equal(t, subj.Name, subjLogin)
-	require.Equal(t, map[string]string{client.SubjectIAMPathKey: iamPathKV}, subj.KV)
+	require.Equal(t, map[string]string{client.IAMPathKey: iamPathKV}, subj.KV)
 	require.ElementsMatch(t, []*keys.PublicKey{extraKey.PublicKey()}, subj.AdditionalKeys)
 
-	ffsid.a.await(ffsid.cli.DeleteSubjectKV(subjAddr, client.SubjectIAMPathKey))
+	ffsid.a.await(ffsid.cli.DeleteSubjectKV(subjAddr, client.IAMPathKey))
 	subj, err = ffsid.cli.GetSubject(subjAddr)
 	require.NoError(t, err)
 	require.Empty(t, subj.KV)
@@ -204,43 +204,59 @@ func TestFrostFSID_Client_GroupManagement(t *testing.T) {
 	ffsid.a.await(ffsid.cli.CreateNamespace(namespace))
 
 	groupName := "group"
-	ffsid.a.await(ffsid.cli.CreateGroup(namespace, groupName))
-	_, _, err := ffsid.cli.CreateGroup(namespace, groupName)
-	require.ErrorContains(t, err, "already exists")
+	groupID := int64(1)
+	actGroupID, err := ffsid.cli.ParseGroupID(ffsid.cli.Wait(ffsid.cli.CreateGroup(namespace, groupName)))
+	require.NoError(t, err)
+	require.Equal(t, groupID, actGroupID)
 
-	group, err := ffsid.cli.GetGroup(namespace, groupName)
+	_, _, err = ffsid.cli.CreateGroup(namespace, groupName)
+	require.ErrorContains(t, err, "is not available")
+
+	iamARN := "arn"
+	ffsid.a.await(ffsid.cli.SetGroupKV(namespace, groupID, client.IAMARNKey, iamARN))
+
+	group, err := ffsid.cli.GetGroup(namespace, groupID)
 	require.NoError(t, err)
 	require.Equal(t, groupName, group.Name)
+	require.Equal(t, map[string]string{client.IAMARNKey: iamARN}, group.KV)
 
-	groupExt, err := ffsid.cli.GetGroupExtended(namespace, groupName)
+	ffsid.a.await(ffsid.cli.DeleteGroupKV(namespace, groupID, client.IAMARNKey))
+
+	groupExt, err := ffsid.cli.GetGroupExtended(namespace, groupID)
 	require.NoError(t, err)
 	require.Zero(t, groupExt.SubjectsCount)
 
 	ffsid.a.await(ffsid.cli.AddSubjectToNamespace(subjAddr, namespace))
-	ffsid.a.await(ffsid.cli.AddSubjectToGroup(subjAddr, groupName))
+	ffsid.a.await(ffsid.cli.AddSubjectToGroup(subjAddr, groupID))
 
 	subjExt, err := ffsid.cli.GetSubjectExtended(subjAddr)
 	require.NoError(t, err)
-	require.ElementsMatch(t, []*client.Group{{Name: groupName, Namespace: namespace}}, subjExt.Groups)
+	require.ElementsMatch(t, []*client.Group{{ID: groupID, Name: groupName, Namespace: namespace, KV: map[string]string{}}}, subjExt.Groups)
 
-	groupExt, err = ffsid.cli.GetGroupExtended(namespace, groupName)
+	groupExt, err = ffsid.cli.GetGroupExtended(namespace, groupID)
 	require.NoError(t, err)
 	require.EqualValues(t, 1, groupExt.SubjectsCount)
 
-	subjects, err := ffsid.cli.ListGroupSubjects(namespace, groupName)
+	subjects, err := ffsid.cli.ListGroupSubjects(namespace, groupID)
 	require.NoError(t, err)
 	require.ElementsMatch(t, []util.Uint160{subjAddr}, subjects)
 
+	ffsid.a.await(ffsid.cli.RemoveSubjectFromGroup(subjAddr, groupID))
+
+	subjects, err = ffsid.cli.ListGroupSubjects(namespace, groupID)
+	require.NoError(t, err)
+	require.Empty(t, subjects)
+
 	subjects, err = ffsid.cli.ListNamespaceSubjects(namespace)
 	require.NoError(t, err)
 	require.ElementsMatch(t, []util.Uint160{subjAddr}, subjects)
 
 	groups, err := ffsid.cli.ListGroups(namespace)
 	require.NoError(t, err)
-	require.ElementsMatch(t, []*client.Group{{Name: groupName, Namespace: namespace}}, groups)
+	require.ElementsMatch(t, []*client.Group{{ID: groupID, Name: groupName, Namespace: namespace, KV: map[string]string{}}}, groups)
 
-	ffsid.a.await(ffsid.cli.DeleteGroup(namespace, groupName))
-	_, err = ffsid.cli.GetGroup(namespace, groupName)
+	ffsid.a.await(ffsid.cli.DeleteGroup(namespace, groupID))
+	_, err = ffsid.cli.GetGroup(namespace, groupID)
 	require.ErrorContains(t, err, "not found")
 
 	groups, err = ffsid.cli.ListGroups(namespace)
@@ -277,33 +293,47 @@ func TestFrostFSID_Client_Lists(t *testing.T) {
 
 	groups := []client.Group{
 		{
+			ID:        1,
 			Name:      "empty-group0",
 			Namespace: namespaces[0],
 		},
 		{
+			ID:        2,
 			Name:      "empty-group1",
 			Namespace: namespaces[1],
 		},
 		{
+			ID:        3,
 			Name:      "group2",
 			Namespace: namespaces[1],
 		},
 		{
+			ID:        4,
 			Name:      "group3",
 			Namespace: namespaces[2],
 		},
 		{
+			ID:        5,
 			Name:      "group4",
 			Namespace: namespaces[3],
 		},
 		{
+			ID:        6,
 			Name:      "group5",
 			Namespace: namespaces[3],
 		},
 	}
 
 	tx = ffsid.cli.StartTx()
-	for _, group := range groups {
+	for _, group := range groups[:3] {
+		err := tx.WrapCall(ffsid.cli.CreateGroupCall(group.Namespace, group.Name))
+		require.NoError(t, err)
+	}
+	ffsid.a.await(ffsid.cli.SendTx(tx))
+
+	// we split into two tx because of gas limit exceeded error
+	tx = ffsid.cli.StartTx()
+	for _, group := range groups[3:] {
 		err := tx.WrapCall(ffsid.cli.CreateGroupCall(group.Namespace, group.Name))
 		require.NoError(t, err)
 	}
@@ -366,12 +396,12 @@ func addSubjectsToGroups(t *testing.T, ffsid *testFrostFSIDClientInvoker, groups
 	cli := ffsid.cli
 	tx := cli.StartTx()
 
-	err := tx.WrapCall(cli.AddSubjectToGroupCall(subjects[2].addr, groups[2].Name))
+	err := tx.WrapCall(cli.AddSubjectToGroupCall(subjects[2].addr, groups[2].ID))
 	require.NoError(t, err)
 
-	err = tx.WrapCall(cli.AddSubjectToGroupCall(subjects[3].addr, groups[3].Name))
+	err = tx.WrapCall(cli.AddSubjectToGroupCall(subjects[3].addr, groups[3].ID))
 	require.NoError(t, err)
-	err = tx.WrapCall(cli.AddSubjectToGroupCall(subjects[4].addr, groups[3].Name))
+	err = tx.WrapCall(cli.AddSubjectToGroupCall(subjects[4].addr, groups[3].ID))
 	require.NoError(t, err)
 
 	ffsid.a.await(cli.SendTx(tx))
@@ -379,13 +409,13 @@ func addSubjectsToGroups(t *testing.T, ffsid *testFrostFSIDClientInvoker, groups
 	// we have to start new tx because of insufficient gas / gas limit exceeded error
 	tx = cli.StartTx()
 
-	err = tx.WrapCall(cli.AddSubjectToGroupCall(subjects[6].addr, groups[4].Name))
+	err = tx.WrapCall(cli.AddSubjectToGroupCall(subjects[6].addr, groups[4].ID))
 	require.NoError(t, err)
-	err = tx.WrapCall(cli.AddSubjectToGroupCall(subjects[7].addr, groups[4].Name))
+	err = tx.WrapCall(cli.AddSubjectToGroupCall(subjects[7].addr, groups[4].ID))
 	require.NoError(t, err)
-	err = tx.WrapCall(cli.AddSubjectToGroupCall(subjects[8].addr, groups[5].Name))
+	err = tx.WrapCall(cli.AddSubjectToGroupCall(subjects[8].addr, groups[5].ID))
 	require.NoError(t, err)
-	err = tx.WrapCall(cli.AddSubjectToGroupCall(subjects[9].addr, groups[5].Name))
+	err = tx.WrapCall(cli.AddSubjectToGroupCall(subjects[9].addr, groups[5].ID))
 	require.NoError(t, err)
 
 	ffsid.a.await(cli.SendTx(tx))
@@ -398,7 +428,7 @@ func checkNamespaceSubjects(t *testing.T, cli *client.Client, ns string, subject
 }
 
 func checkGroupSubjects(t *testing.T, cli *client.Client, group client.Group, subjects []testSubject, start, end int) {
-	groupSubjects, err := cli.ListGroupSubjects(group.Namespace, group.Name)
+	groupSubjects, err := cli.ListGroupSubjects(group.Namespace, group.ID)
 	require.NoError(t, err)
 	require.ElementsMatch(t, subjSlice(subjects, start, end), groupSubjects)
 }
@@ -448,6 +478,7 @@ func TestFrostFSID_Client_UseCaseListNSSubjects(t *testing.T) {
 
 	namespace := "namespace"
 	group := "group"
+	groupID := int64(1)
 
 	tx := ffsid.cli.StartTx()
 	err := tx.WrapCall(ffsid.cli.CreateNamespaceCall(namespace))
@@ -471,7 +502,7 @@ func TestFrostFSID_Client_UseCaseListNSSubjects(t *testing.T) {
 		require.NoError(t, err)
 
 		if i > len(subjects)/2 {
-			err = tx.WrapCall(ffsid.cli.AddSubjectToGroupCall(subjects[i].addr, group))
+			err = tx.WrapCall(ffsid.cli.AddSubjectToGroupCall(subjects[i].addr, groupID))
 			require.NoError(t, err)
 		}
 		ffsid.a.await(ffsid.cli.SendTx(tx))
diff --git a/tests/frostfsid_test.go b/tests/frostfsid_test.go
index 2ae6099..92bbb4a 100644
--- a/tests/frostfsid_test.go
+++ b/tests/frostfsid_test.go
@@ -50,6 +50,10 @@ const (
 	createGroupMethod            = "createGroup"
 	getGroupMethod               = "getGroup"
 	getGroupExtendedMethod       = "getGroupExtended"
+	getGroupIDByNameMethod       = "getGroupIDByName"
+	setGroupNameMethod           = "setGroupName"
+	setGroupKVMethod             = "setGroupKV"
+	deleteGroupKVMethod          = "deleteGroupKV"
 	listGroupsMethod             = "listGroups"
 	addSubjectToGroupMethod      = "addSubjectToGroup"
 	removeSubjectFromGroupMethod = "removeSubjectFromGroup"
@@ -220,16 +224,16 @@ func TestFrostFSID_SubjectManagement(t *testing.T) {
 	t.Run("set subject KVs", func(t *testing.T) {
 		iamPath := "iam/path"
 
-		anonInvoker.InvokeFail(t, notWitnessedError, setSubjectKVMethod, subjKeyAddr, client.SubjectIAMPathKey, iamPath)
-		invoker.Invoke(t, stackitem.Null{}, setSubjectKVMethod, subjKeyAddr, client.SubjectIAMPathKey, iamPath)
+		anonInvoker.InvokeFail(t, notWitnessedError, setSubjectKVMethod, subjKeyAddr, client.IAMPathKey, iamPath)
+		invoker.Invoke(t, stackitem.Null{}, setSubjectKVMethod, subjKeyAddr, client.IAMPathKey, iamPath)
 
 		s, err = anonInvoker.TestInvoke(t, getSubjectMethod, subjKeyAddr)
 		require.NoError(t, err)
 		subj = parseSubject(t, s)
-		require.Equal(t, iamPath, subj.KV[client.SubjectIAMPathKey])
+		require.Equal(t, iamPath, subj.KV[client.IAMPathKey])
 
-		anonInvoker.InvokeFail(t, notWitnessedError, deleteSubjectKVMethod, subjKeyAddr, client.SubjectIAMPathKey)
-		invoker.Invoke(t, stackitem.Null{}, deleteSubjectKVMethod, subjKeyAddr, client.SubjectIAMPathKey)
+		anonInvoker.InvokeFail(t, notWitnessedError, deleteSubjectKVMethod, subjKeyAddr, client.IAMPathKey)
+		invoker.Invoke(t, stackitem.Null{}, deleteSubjectKVMethod, subjKeyAddr, client.IAMPathKey)
 
 		s, err = anonInvoker.TestInvoke(t, getSubjectMethod, subjKeyAddr)
 		require.NoError(t, err)
@@ -324,6 +328,55 @@ func TestFrostFSIS_SubjectNameRelatedInvariants(t *testing.T) {
 	checkPublicKeyResult(t, s, err, nil)
 }
 
+func TestFrostFSIS_GroupNameRelatedInvariants(t *testing.T) {
+	f := newFrostFSIDInvoker(t)
+
+	groupName1, groupName2 := "group1", "group2"
+	groupID1, groupID2 := int64(1), int64(2)
+
+	invoker := f.OwnerInvoker()
+
+	ns1, ns2 := "ns1", "ns2"
+
+	// Create two group
+	// Create two namespace.
+	// Add these groups to ns1
+	invoker.Invoke(t, stackitem.Null{}, createNamespaceMethod, ns1)
+	invoker.Invoke(t, stackitem.Null{}, createNamespaceMethod, ns2)
+	invoker.Invoke(t, stackitem.Make(groupID1), createGroupMethod, ns1, groupName1)
+	invoker.Invoke(t, stackitem.Make(groupID2), createGroupMethod, ns1, groupName2)
+
+	// Check that we can find group id by name for group1 in ns1 and not in ns2
+	s, err := invoker.TestInvoke(t, getGroupIDByNameMethod, ns1, groupName1)
+	checkGroupIDResult(t, s, err, groupID1)
+	s, err = invoker.TestInvoke(t, getGroupIDByNameMethod, ns2, groupName1)
+	checkGroupIDResult(t, s, err, -1)
+
+	// Check that we cannot set for second group name that the first subject has already taken
+	invoker.InvokeFail(t, "not available", setGroupNameMethod, ns1, groupID1, groupName2)
+
+	// Check that we cannot create group with the same name in namespace, but can in another
+	invoker.InvokeFail(t, "not available", createGroupMethod, ns1, groupName2)
+	invoker.Invoke(t, stackitem.Make(3), createGroupMethod, ns2, groupName2)
+
+
+	// Check that we cannot find group id by name for group that was removed
+	invoker.Invoke(t, stackitem.Null{}, deleteGroupMethod, ns1, groupID2)
+	s, err = invoker.TestInvoke(t, getGroupIDByNameMethod, ns1, groupName2)
+	checkGroupIDResult(t, s, err, -1)
+
+	// Check that we can create group with the name that was freed after deleting
+	invoker.Invoke(t, stackitem.Make(4), createGroupMethod, ns1, groupName2)
+
+	// Check that after group renaming its id cannot be found by old name
+	newGroupName:= "new"
+	invoker.Invoke(t, stackitem.Null{}, setGroupNameMethod, ns1, groupID1, newGroupName)
+	s, err = invoker.TestInvoke(t, getGroupIDByNameMethod, ns1, groupName1)
+	checkGroupIDResult(t, s, err, -1)
+	s, err = invoker.TestInvoke(t, getGroupIDByNameMethod, ns1, newGroupName)
+	checkGroupIDResult(t, s, err, groupID1)
+}
+
 func TestFrostFSID_NamespaceManagement(t *testing.T) {
 	f := newFrostFSIDInvoker(t)
 
@@ -428,19 +481,21 @@ func TestFrostFSID_GroupManagement(t *testing.T) {
 	nsName := "namespace"
 	invoker.Invoke(t, stackitem.Null{}, createNamespaceMethod, nsName)
 
+	groupID := int64(1)
 	groupName := "group"
 	anonInvoker.InvokeFail(t, notWitnessedError, createGroupMethod, nsName, groupName)
-	invoker.Invoke(t, stackitem.Null{}, createGroupMethod, nsName, groupName)
+	invoker.Invoke(t, stackitem.Make(groupID), createGroupMethod, nsName, groupName)
 
-	s, err := anonInvoker.TestInvoke(t, getGroupMethod, nsName, groupName)
+	s, err := anonInvoker.TestInvoke(t, getGroupMethod, nsName, groupID)
 	require.NoError(t, err)
 	group := parseGroup(t, s.Pop().Item())
+	require.Equal(t, groupID, group.ID)
 	require.Equal(t, groupName, group.Name)
 
 	s, err = anonInvoker.TestInvoke(t, listGroupsMethod, nsName)
 	require.NoError(t, err)
 	groups := parseGroups(t, readIteratorAll(s))
-	require.ElementsMatch(t, groups, []Group{{Name: groupName, Namespace: nsName}})
+	require.ElementsMatch(t, groups, []Group{{ID: groupID, Name: groupName, Namespace: nsName}})
 
 	t.Run("add subjects to group", func(t *testing.T) {
 		subjKey, err := keys.NewPrivateKey()
@@ -449,21 +504,21 @@ func TestFrostFSID_GroupManagement(t *testing.T) {
 
 		subjAddress := subjKey.PublicKey().GetScriptHash()
 		invoker.Invoke(t, stackitem.Null{}, addSubjectToNamespaceMethod, subjAddress, nsName)
-		anonInvoker.InvokeFail(t, "not witnessed", addSubjectToGroupMethod, subjAddress, groupName)
-		invoker.Invoke(t, stackitem.Null{}, addSubjectToGroupMethod, subjAddress, groupName)
+		anonInvoker.InvokeFail(t, "not witnessed", addSubjectToGroupMethod, subjAddress, groupID)
+		invoker.Invoke(t, stackitem.Null{}, addSubjectToGroupMethod, subjAddress, groupID)
 
 		t.Run("list group subjects", func(t *testing.T) {
-			s, err = anonInvoker.TestInvoke(t, listGroupSubjectsMethod, nsName, groupName)
+			s, err = anonInvoker.TestInvoke(t, listGroupSubjectsMethod, nsName, groupID)
 			require.NoError(t, err)
 
 			addresses, err := unwrap.ArrayOfUint160(makeValidRes(stackitem.NewArray(readIteratorAll(s))), nil)
 			require.NoError(t, err)
 			require.ElementsMatch(t, addresses, []util.Uint160{subjAddress})
 
-			anonInvoker.InvokeFail(t, "not witnessed", removeSubjectFromGroupMethod, subjAddress, nsName, groupName)
-			invoker.Invoke(t, stackitem.Null{}, removeSubjectFromGroupMethod, subjAddress, nsName, groupName)
+			anonInvoker.InvokeFail(t, "not witnessed", removeSubjectFromGroupMethod, subjAddress, groupID)
+			invoker.Invoke(t, stackitem.Null{}, removeSubjectFromGroupMethod, subjAddress, groupID)
 
-			s, err = anonInvoker.TestInvoke(t, listGroupSubjectsMethod, nsName, groupName)
+			s, err = anonInvoker.TestInvoke(t, listGroupSubjectsMethod, nsName, groupID)
 			require.NoError(t, err)
 
 			addresses, err = unwrap.ArrayOfUint160(makeValidRes(stackitem.NewArray(readIteratorAll(s))), nil)
@@ -477,23 +532,61 @@ func TestFrostFSID_GroupManagement(t *testing.T) {
 					require.NoError(t, err)
 					invoker.Invoke(t, stackitem.Null{}, createSubjectMethod, subjKey.PublicKey().Bytes())
 					invoker.Invoke(t, stackitem.Null{}, addSubjectToNamespaceMethod, subjKey.PublicKey().GetScriptHash(), nsName)
-					invoker.Invoke(t, stackitem.Null{}, addSubjectToGroupMethod, subjKey.PublicKey().GetScriptHash(), groupName)
+					invoker.Invoke(t, stackitem.Null{}, addSubjectToGroupMethod, subjKey.PublicKey().GetScriptHash(), groupID)
 				}
 
-				s, err = anonInvoker.TestInvoke(t, getGroupExtendedMethod, nsName, groupName)
+				s, err = anonInvoker.TestInvoke(t, getGroupExtendedMethod, nsName, groupID)
 				require.NoError(t, err)
 				groupExt := parseGroupExtended(t, s.Pop().Item())
+				require.Equal(t, groupID, groupExt.ID)
 				require.Equal(t, groupName, groupExt.Name)
+				require.Empty(t, groupExt.KV)
 				require.EqualValues(t, subjectsCount, groupExt.SubjectsCount)
 			})
 		})
 	})
 
-	t.Run("delete group", func(t *testing.T) {
-		anonInvoker.InvokeFail(t, notWitnessedError, deleteGroupMethod, nsName, groupName)
-		invoker.Invoke(t, stackitem.Null{}, deleteGroupMethod, nsName, groupName)
+	t.Run("set group name", func(t *testing.T) {
+		newGroupName := "new-name"
 
-		anonInvoker.InvokeFail(t, "group not found", getGroupMethod, nsName, groupName)
+		anonInvoker.InvokeFail(t, notWitnessedError, setGroupNameMethod, nsName, groupID, newGroupName)
+		invoker.Invoke(t, stackitem.Null{}, setGroupNameMethod, nsName, groupID, newGroupName)
+
+		s, err = anonInvoker.TestInvoke(t, getGroupIDByNameMethod, nsName, newGroupName)
+		require.NoError(t, err)
+		require.Equal(t, groupID, s.Pop().BigInt().Int64())
+
+		s, err = anonInvoker.TestInvoke(t, getGroupMethod, nsName, groupID)
+		require.NoError(t, err)
+		group = parseGroup(t, s.Pop().Item())
+		require.Equal(t, newGroupName, group.Name)
+	})
+
+	t.Run("set group KVs", func(t *testing.T) {
+		iamARN := "arn"
+
+		anonInvoker.InvokeFail(t, notWitnessedError, setGroupKVMethod, nsName, groupID, client.IAMARNKey, iamARN)
+		invoker.Invoke(t, stackitem.Null{}, setGroupKVMethod, nsName, groupID, client.IAMARNKey, iamARN)
+
+		s, err = anonInvoker.TestInvoke(t, getGroupMethod, nsName, groupID)
+		require.NoError(t, err)
+		group = parseGroup(t, s.Pop().Item())
+		require.Equal(t, iamARN, group.KV[client.IAMARNKey])
+
+		anonInvoker.InvokeFail(t, notWitnessedError, deleteGroupKVMethod, nsName, groupID, client.IAMARNKey)
+		invoker.Invoke(t, stackitem.Null{}, deleteGroupKVMethod, nsName, groupID, client.IAMARNKey)
+
+		s, err = anonInvoker.TestInvoke(t, getGroupMethod, nsName, groupID)
+		require.NoError(t, err)
+		group = parseGroup(t, s.Pop().Item())
+		require.Empty(t, group.KV)
+	})
+
+	t.Run("delete group", func(t *testing.T) {
+		anonInvoker.InvokeFail(t, notWitnessedError, deleteGroupMethod, nsName, groupID)
+		invoker.Invoke(t, stackitem.Null{}, deleteGroupMethod, nsName, groupID)
+
+		anonInvoker.InvokeFail(t, "group not found", getGroupMethod, nsName, groupID)
 
 		s, err = anonInvoker.TestInvoke(t, listGroupsMethod, nsName)
 		require.NoError(t, err)
@@ -514,6 +607,18 @@ func checkPublicKeyResult(t *testing.T, s *vm.Stack, err error, key *keys.Privat
 	require.Equal(t, key.PublicKey(), foundKey)
 }
 
+func checkGroupIDResult(t *testing.T, s *vm.Stack, err error, groupID int64) {
+	if groupID == -1 {
+		require.ErrorContains(t, err, "not found")
+		return
+	}
+
+	require.NoError(t, err)
+	foundGroupID, err := unwrap.Int64(makeValidRes(s.Pop().Item()), nil)
+	require.NoError(t, err)
+	require.Equal(t, groupID, foundGroupID)
+}
+
 func readIteratorAll(s *vm.Stack) []stackitem.Item {
 	iter := s.Pop().Value().(*storage.Iterator)
 
@@ -649,13 +754,17 @@ func parseNamespaces(t *testing.T, items []stackitem.Item) []Namespace {
 }
 
 type Group struct {
+	ID        int64
 	Name      string
 	Namespace string
+	KV        map[string]string
 }
 
 type GroupExtended struct {
+	ID            int64
 	Name          string
 	Namespace     string
+	KV            map[string]string
 	SubjectsCount int64
 }
 
@@ -663,16 +772,23 @@ func parseGroup(t *testing.T, item stackitem.Item) Group {
 	var group Group
 
 	subjStruct := item.Value().([]stackitem.Item)
-	require.Len(t, subjStruct, 2)
+	require.Len(t, subjStruct, 4)
 
-	nameBytes, err := subjStruct[0].TryBytes()
+	groupID, err := subjStruct[0].TryInteger()
+	require.NoError(t, err)
+	group.ID = groupID.Int64()
+
+	nameBytes, err := subjStruct[1].TryBytes()
 	require.NoError(t, err)
 	group.Name = string(nameBytes)
 
-	namespaceBytes, err := subjStruct[1].TryBytes()
+	namespaceBytes, err := subjStruct[2].TryBytes()
 	require.NoError(t, err)
 	group.Namespace = string(namespaceBytes)
 
+	group.KV, err = parseMap(subjStruct[3])
+	require.NoError(t, err)
+
 	return group
 }
 
@@ -680,17 +796,24 @@ func parseGroupExtended(t *testing.T, item stackitem.Item) GroupExtended {
 	var gr GroupExtended
 
 	subjStruct := item.Value().([]stackitem.Item)
-	require.Len(t, subjStruct, 3)
+	require.Len(t, subjStruct, 5)
 
-	nameBytes, err := subjStruct[0].TryBytes()
+	groupID, err := subjStruct[0].TryInteger()
+	require.NoError(t, err)
+	gr.ID = groupID.Int64()
+
+	nameBytes, err := subjStruct[1].TryBytes()
 	require.NoError(t, err)
 	gr.Name = string(nameBytes)
 
-	namespaceBytes, err := subjStruct[1].TryBytes()
+	namespaceBytes, err := subjStruct[2].TryBytes()
 	require.NoError(t, err)
 	gr.Namespace = string(namespaceBytes)
 
-	subjectsCountInt, err := subjStruct[2].TryInteger()
+	gr.KV, err = parseMap(subjStruct[3])
+	require.NoError(t, err)
+
+	subjectsCountInt, err := subjStruct[4].TryInteger()
 	require.NoError(t, err)
 	gr.SubjectsCount = subjectsCountInt.Int64()