Re: DISCUSS: draft-ietf-sip-dtls-srtp-frameworkdraft-ietf-sip-dtls-srtp-framework

Hi Eric,

Eric Rescorla wrote:
> But then the attacker isn't *intercepting* their communications.
> Alice calls Bob and ends up talking to someone but she knows
> that she doesn't know who. The point is you can't use this to
> mount an MITM attack.

Again. I agree with what you said. What I was commenting on is the 
following text from the draft

"Bob would know that an attack was happening.  The fact that
  one side can detect this attack means that in most cases where Alice
  and Bob both wish the communications to be encrypted there is not a
  problem."

My question was, how would Bob detect this attack?

Thanks
Suresh