Cisco Unified Communications Manager maintains the authentication and encryption status at the device level. If all devices that are involved in the call register as secure, the call status registers as secure. If one device registers as nonsecure, the call registers as nonsecure, even if the phone of the caller or recipient registers as secure.
There is also in the same security guide the term "protected".
I am so confused by the terms and also what impact does the Device Security Profile have on the IP phones. Do they over-ride the the device specific security setting in CAPF Information??
I got asked whether three end points (A, B and C) that have encrypted signalling can do the following:
When A calls B, the communication is encrypted?
When B calls C, the communcation is not encrypted?
For A to B, I believe it can but B to C is a mystery.
Some assistance or even a pointer in the right direction would be appreciated.
Found this link which kinda sheds some light on the whole black box for me:
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