[VOIPSEC] Does anyone know what the Key Management(MIKEY, KEYMGT, ...) of SRTP in Cisco IP phone?

[Dan Wing]

> Does anyone know what the Key Management (MIKEY,KEYMGT,...) 
> of SRTP in Cisco IP phone?

Cisco's IP phones do SRTP only when signaled with Cisco's
proprietary SCCP ("Skinny" protocol), when SCCP is running
over mutually-authenticated TLS, and the phone and Call 
Manager are configured to enable SRTP.  Although SCCP 
doesn't use SDP, the SRTP keys are exchanged in the SCCP 
signaling using a technique similar to 
draft-ietf-mmusic-sdescriptions-11.txt.

-d