diff --git a/src/webrtc/pkg/session/receiver/receiver.go b/src/webrtc/pkg/session/receiver/receiver.go
index 7d8de2cd..7f1d953a 100644
--- a/src/webrtc/pkg/session/receiver/receiver.go
+++ b/src/webrtc/pkg/session/receiver/receiver.go
@@ -138,12 +138,12 @@ func (s *Session) CreateDataHandler() {
 	})
 }
 
-func (s *Session) ReceiveData(pathToFile string, fileSize int64) {
-	s.receiveData(pathToFile, fileSize)
+func (s *Session) ReceiveData(pathToFile string, fileSize int64, sharedSecret []byte) {
+	s.receiveData(pathToFile, fileSize, sharedSecret)
 	s.sess.OnCompletion()
 }
 
-func (s *Session) receiveData(pathToFile string, fileSize int64) error {
+func (s *Session) receiveData(pathToFile string, fileSize int64, sharedSecret []byte) error {
 	log.Debugln("Starting to receive data...")
 	log.Debugf("receiving %s", pathToFile)
 
@@ -195,7 +195,7 @@ func (s *Session) receiveData(pathToFile string, fileSize int64) error {
 			log.Debug("closed gracefully")
 			return nil
 		case msg := <-s.msgChannel:
-			buff, errDecrypt := crypt.DecryptFromBytes(msg.Data, []byte{1, 2, 3, 4})
+			buff, errDecrypt := crypt.DecryptFromBytes(msg.Data, sharedSecret)
 			if errDecrypt != nil {
 				log.Error(errDecrypt)
 				return errDecrypt
diff --git a/src/webrtc/pkg/session/sender/sender.go b/src/webrtc/pkg/session/sender/sender.go
index 02b1ab75..1dbfcf3b 100644
--- a/src/webrtc/pkg/session/sender/sender.go
+++ b/src/webrtc/pkg/session/sender/sender.go
@@ -117,8 +117,8 @@ func (s *Session) SetSDP(sdp string) error {
 	return s.sess.SetSDP(sdp)
 }
 
-func (s *Session) TransferFile(pathToFile string) {
-	s.readFile(pathToFile)
+func (s *Session) TransferFile(pathToFile string, sharedSecret []byte) {
+	s.readFile(pathToFile, sharedSecret)
 	s.sess.OnCompletion()
 }
 
@@ -186,7 +186,7 @@ func (s *Session) CreateDataChannel() error {
 	return nil
 }
 
-func (s *Session) readFile(pathToFile string) error {
+func (s *Session) readFile(pathToFile string, sharedSecret []byte) error {
 	f, err := os.Open(pathToFile)
 	if err != nil {
 		log.Error(err)
@@ -232,7 +232,7 @@ func (s *Session) readFile(pathToFile string) error {
 			}
 			buff = append(buff, s.dataBuff[:n-i]...)
 			buff = compress.Compress(buff)
-			buff = crypt.EncryptToBytes(buff, []byte{1, 2, 3, 4})
+			buff = crypt.EncryptToBytes(buff, sharedSecret)
 			if len(buff) < maxPacketSize {
 				if n-i > 0 {
 					lastBytes = append([]byte(nil), s.dataBuff[n-i:]...)