[asterisk-dev] Re: AstriDevCon Recap - IAX2 RENEW for encryption

Kevin P. Fleming kpfleming at digium.com
Fri Jun 1 08:58:16 MST 2007

Tony Mountifield wrote:

> In the IAX scenario, having updated the even key, it would continue using
> the odd key for encryption until it received an ack of the change to the
> even key from the peer. It would then be free to start using the even key
> at some point, and at any time later to update the odd key.

I think the issue here is that in IAX2, the *entire* packet is
encrypted, there is no unencrypted header that can indicate which key
was used for encryption.

Kevin P. Fleming
Director of Software Technologies
Digium, Inc. - "The Genuine Asterisk Experience" (TM)

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