diff --git a/object/types.go b/object/types.go
index f433b9c..79cef65 100644
--- a/object/types.go
+++ b/object/types.go
@@ -67,6 +67,8 @@ const (
 	IntegrityHdr
 	// StorageGroupHdr is a storage group header type.
 	StorageGroupHdr
+	// PublicKeyHdr is a public key header type.
+	PublicKeyHdr
 )
 
 var (
@@ -140,6 +142,8 @@ func (m Header) typeOf(t isHeader_Value) (ok bool) {
 		_, ok = m.Value.(*Header_Integrity)
 	case *Header_StorageGroup:
 		_, ok = m.Value.(*Header_StorageGroup)
+	case *Header_PublicKey:
+		_, ok = m.Value.(*Header_PublicKey)
 	}
 	return
 }
@@ -168,6 +172,8 @@ func HeaderType(t headerType) Pred {
 		return func(h *Header) bool { _, ok := h.Value.(*Header_Integrity); return ok }
 	case StorageGroupHdr:
 		return func(h *Header) bool { _, ok := h.Value.(*Header_StorageGroup); return ok }
+	case PublicKeyHdr:
+		return func(h *Header) bool { _, ok := h.Value.(*Header_PublicKey); return ok }
 	default:
 		return nil
 	}
diff --git a/object/types.pb.go b/object/types.pb.go
index b5a1e78..525b39b 100644
Binary files a/object/types.pb.go and b/object/types.pb.go differ
diff --git a/object/types.proto b/object/types.proto
index 8f50f76..293f347 100644
--- a/object/types.proto
+++ b/object/types.proto
@@ -45,6 +45,8 @@ message Header {
         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;
     }
 }
 
@@ -122,3 +124,8 @@ message Object {
     // Payload is an object's payload
     bytes Payload             = 3;
 }
+
+message PublicKey {
+    // Value contains marshaled ecdsa public key
+    bytes Value = 1;
+}