diff --git a/pkg/context/context.go b/pkg/context/context.go
index b3c2d2d..63f80d6 100755
--- a/pkg/context/context.go
+++ b/pkg/context/context.go
@@ -44,6 +44,7 @@ type N3UE struct {
 	RanUeContext         *security.RanUeContext
 	MobileIdentity5GS    nasType.MobileIdentity5GS
 	IkeInitiatorSPI      uint64
+	IkeIDInitiator       []byte
 	Secert               *big.Int
 	Factor               *big.Int
 	Proposal             *message.Proposal
diff --git a/pkg/ike/handler.go b/pkg/ike/handler.go
index 14db450..4dcc49c 100755
--- a/pkg/ike/handler.go
+++ b/pkg/ike/handler.go
@@ -503,7 +503,8 @@ func (s *Server) handleIKEAUTH(
 		}
 
 		var idPayload ike_message.IKEPayloadContainer
-		idPayload.BuildIdentificationInitiator(ike_message.ID_KEY_ID, []byte("UE"))
+		idInitiator := n3ueSelf.IkeIDInitiator
+		idPayload.BuildIdentificationInitiator(ike_message.ID_KEY_ID, idInitiator)
 		idPayloadData, err := idPayload.Encode()
 		if err != nil {
 			ikeLog.Errorln(err)
diff --git a/pkg/ike/send.go b/pkg/ike/send.go
index aa5f7e0..e481c87 100755
--- a/pkg/ike/send.go
+++ b/pkg/ike/send.go
@@ -137,7 +137,16 @@ func (s *Server) SendIkeAuth() {
 	var ikePayload ike_message.IKEPayloadContainer
 
 	// Identification
-	ikePayload.BuildIdentificationInitiator(ike_message.ID_KEY_ID, []byte("UE"))
+	idByte := make([]byte, 8)
+	id, err := ike_security.GenerateRandomNumber()
+	if err != nil {
+		ikeLog.Errorf("error generating IDi: %d", err)
+		return
+	}
+
+	binary.BigEndian.PutUint64(idByte, id.Uint64())
+	ikePayload.BuildIdentificationInitiator(ike_message.ID_KEY_ID, idByte)
+	n3ueContext.IkeIDInitiator = idByte
 
 	// Security Association
 	n3ueContext.SecurityAssociation = ikePayload.BuildSecurityAssociation()
@@ -196,7 +205,7 @@ func (s *Server) SendIkeAuth() {
 		n3ueContext.N3IWFUe.IKEConnection = n3ueContext.IKEConnection[4500]
 	}
 
-	err := s.SendIkeMsgToN3iwf(
+	err = s.SendIkeMsgToN3iwf(
 		n3ueContext.N3IWFUe.IKEConnection,
 		ikeMessage,
 		n3ueContext.N3IWFUe.N3IWFIKESecurityAssociation)