Key management between a cable telephony adapter and associated signaling controller

Abstract From the Canadian patent

A highly scalable key management architecture for secure client-server systems used in IP telephony network, wherein cryptographic state needs to be saved only by the clients. This architecture takes advantage of existing key management protocols, Kerberos with the PKINIT (public key) extension to , provide an IP telephony system having a high degree of scalability. In the case of lost security associations, the architecture provides for lightweight rekeying operations that allow clients to quickly re-establish the lost association or switch to a different server. The key management architecture includes a method for establishing a secure channel between an IP telephony endpoint and …