diff --git a/internal/context/amf_ue.go b/internal/context/amf_ue.go
index 4d91da2e..eb5ff718 100644
--- a/internal/context/amf_ue.go
+++ b/internal/context/amf_ue.go
@@ -14,7 +14,6 @@ import (
 
 	"github.com/free5gc/amf/internal/logger"
 	"github.com/free5gc/amf/pkg/factory"
-	"github.com/free5gc/nas"
 	"github.com/free5gc/nas/nasMessage"
 	"github.com/free5gc/nas/nasType"
 	"github.com/free5gc/nas/security"
@@ -64,10 +63,10 @@ type AmfUe struct {
 	RegistrationType5GS                uint8
 	IdentityTypeUsedForRegistration    uint8
 	RegistrationRequest                *nasMessage.RegistrationRequest
-	SecurityHeader                     nas.SecurityHeader
 	ServingAmfChanged                  bool
 	DeregistrationTargetAccessType     uint8 // only used when deregistration procedure is initialized by the network
 	RegistrationAcceptForNon3GPPAccess []byte
+	NasPduValue                        []byte
 	RetransmissionOfInitialNASMsg      bool
 	RequestIdentityType                uint8
 	/* Used for AMF relocation */
diff --git a/internal/nas/handler.go b/internal/nas/handler.go
index 54e6f095..dee9a22b 100644
--- a/internal/nas/handler.go
+++ b/internal/nas/handler.go
@@ -33,10 +33,7 @@ func HandleNAS(ue *amf_context.RanUe, procedureCode int64, nasPdu []byte, initia
 		ue.AmfUe.NASLog.Errorln(err)
 		return
 	}
-	ue.AmfUe.SecurityHeader.ProtocolDiscriminator = msg.ProtocolDiscriminator
-	ue.AmfUe.SecurityHeader.SecurityHeaderType = msg.SecurityHeaderType
-	ue.AmfUe.SecurityHeader.SequenceNumber = msg.SequenceNumber
-	ue.AmfUe.SecurityHeader.MessageAuthenticationCode = msg.MessageAuthenticationCode
+	ue.AmfUe.NasPduValue = nasPdu
 	ue.AmfUe.MacFailed = !integrityProtected
 
 	if err := Dispatch(ue.AmfUe, ue.Ran.AnType, procedureCode, msg); err != nil {
diff --git a/internal/sbi/consumer/communication.go b/internal/sbi/consumer/communication.go
index e21af5f2..8f545afb 100644
--- a/internal/sbi/consumer/communication.go
+++ b/internal/sbi/consumer/communication.go
@@ -1,9 +1,7 @@
 package consumer
 
 import (
-	"bytes"
 	"context"
-	"encoding/binary"
 	"fmt"
 
 	amf_context "github.com/free5gc/amf/internal/context"
@@ -215,30 +213,13 @@ func UEContextTransferRequest(
 		JsonData: &ueContextTransferReqData,
 	}
 	if transferReason == models.TransferReason_INIT_REG || transferReason == models.TransferReason_MOBI_REG {
-		var buf bytes.Buffer
-		if err = binary.Write(&buf, binary.BigEndian, ue.SecurityHeader.ProtocolDiscriminator); err != nil {
-			logger.ConsumerLog.Error("NAS encode error (SecurityHeader/ProtocolDiscriminator): %w", err)
-		}
-		if err = binary.Write(&buf, binary.BigEndian, ue.SecurityHeader.SecurityHeaderType); err != nil {
-			logger.ConsumerLog.Error("NAS encode error (SecurityHeader/SecurityHeaderType): %w", err)
-		}
-		if err = binary.Write(&buf, binary.BigEndian, ue.SecurityHeader.MessageAuthenticationCode); err != nil {
-			logger.ConsumerLog.Error("NAS encode error (SecurityHeader/MessageAuthenticationCode): %w", err)
-		}
-		if err = binary.Write(&buf, binary.BigEndian, ue.SecurityHeader.SequenceNumber); err != nil {
-			logger.ConsumerLog.Error("NAS encode error (SecurityHeader/SequenceNumber): %w", err)
-		}
-		err = ue.RegistrationRequest.EncodeRegistrationRequest(&buf)
-		if err != nil {
-			return nil, nil, fmt.Errorf("re-encoding registration request message is failed: %w", err)
-		}
 		ueContextTransferReqData.RegRequest = &models.N1MessageContainer{
 			N1MessageClass: models.N1MessageClass__5_GMM,
 			N1MessageContent: &models.RefToBinaryData{
 				ContentId: "n1Msg",
 			},
 		}
-		req.BinaryDataN1Message = buf.Bytes()
+		req.BinaryDataN1Message = ue.NasPduValue
 	}
 
 	// guti format is defined at TS 29.518 Table 6.1.3.2.2-1 5g-guti-[0-9]{5,6}[0-9a-fA-F]{14}