diff --git a/object/types.proto b/object/types.proto
index be4afa4..b64f75f 100644
--- a/object/types.proto
+++ b/object/types.proto
@@ -33,8 +33,6 @@ message ExtendedHeader {
     IntegrityHeader Integrity = 9;
     // StorageGroup contains meta information for the data audit
     storagegroup.StorageGroup StorageGroup = 10;
-    // PublicKey of owner of the object. Key is used for verification and can be based on NeoID or x509 cert.
-    PublicKey PublicKey = 11;
 }
 
 message Tombstone {}
@@ -54,8 +52,10 @@ message SystemHeader {
 message IntegrityHeader {
     // HeadersChecksum is a checksum of all above headers in the object
     bytes HeadersChecksum   = 1;
+    // CreatorKey carries public key of the object creator in a binary format.
+    bytes CreatorKey = 2;
     // ChecksumSignature is an user's signature of checksum to verify if it is correct
-    bytes ChecksumSignature = 2;
+    bytes ChecksumSignature = 3;
 }
 
 // SplitHeader groups information about spawning the object through a payload splitting.
@@ -91,8 +91,3 @@ message Object {
     // Payload is an object's payload
     bytes Payload = 2;
 }
-
-message PublicKey {
-    // Value contains marshaled ecdsa public key
-    bytes Value = 1;
-}
diff --git a/proto-docs/object.md b/proto-docs/object.md
index 3ffd4b3..0f462e0 100644
--- a/proto-docs/object.md
+++ b/proto-docs/object.md
@@ -34,7 +34,6 @@
     - [Header](#object.Header)
     - [IntegrityHeader](#object.IntegrityHeader)
     - [Object](#object.Object)
-    - [PublicKey](#object.PublicKey)
     - [SplitHeader](#object.SplitHeader)
     - [SystemHeader](#object.SystemHeader)
     - [Tombstone](#object.Tombstone)
@@ -388,7 +387,6 @@ Attribute groups the parameters of the object attributes.
 | PayloadChecksum | [bytes](#bytes) |  | PayloadChecksum of actual object's payload |
 | Integrity | [IntegrityHeader](#object.IntegrityHeader) |  | Integrity header with checksum of all above headers in the object |
 | StorageGroup | [storagegroup.StorageGroup](#storagegroup.StorageGroup) |  | StorageGroup contains meta information for the data audit |
-| PublicKey | [PublicKey](#object.PublicKey) |  | PublicKey of owner of the object. Key is used for verification and can be based on NeoID or x509 cert. |
 
 
 <a name="object.Header"></a>
@@ -412,6 +410,7 @@ Header groups the information about the NeoFS object.
 | Field | Type | Label | Description |
 | ----- | ---- | ----- | ----------- |
 | HeadersChecksum | [bytes](#bytes) |  | HeadersChecksum is a checksum of all above headers in the object |
+| CreatorKey | [bytes](#bytes) |  | CreatorKey carries public key of the object creator in a binary format. |
 | ChecksumSignature | [bytes](#bytes) |  | ChecksumSignature is an user's signature of checksum to verify if it is correct |
 
 
@@ -427,17 +426,6 @@ Header groups the information about the NeoFS object.
 | Payload | [bytes](#bytes) |  | Payload is an object's payload |
 
 
-<a name="object.PublicKey"></a>
-
-### Message PublicKey
-
-
-
-| Field | Type | Label | Description |
-| ----- | ---- | ----- | ----------- |
-| Value | [bytes](#bytes) |  | Value contains marshaled ecdsa public key |
-
-
 <a name="object.SplitHeader"></a>
 
 ### Message SplitHeader
@@ -475,7 +463,6 @@ SplitHeader groups information about spawning the object through a payload split
 
  <!-- end messages -->
 
-
  <!-- end enums -->