End-to-end protection of media stream encryption keys for voice-over-ip systems

The invention reduced the key material is communication channel intermediate the exposition between the first and second servers. In one embodiment, the second server from the first of the first server and media stream key. The second server is based on application request and ticket of Kerberos to transmit the media stream key second half to the first server. Using the method, the exposition of media stream key is reduced to is exposed is electrically connected with the server.