[asterisk-dev] AES encryption in IAX2

[Tim Panton]

On 24 Dec 2008, at 13:12, Kevin P. Fleming wrote:

> Tim Panton wrote:
>
>> So this would save an average of 8 bytes per miniframe, but the big
>> win is with GSM, where
>> the 33byte frame expands to 64 bytes  to cover the encryption. This
>> way we could get
>> it back to 33 :-)  which is a worthwhile saving.
>
> Can you think of a way this could be implemented and be backwards
> compatible?

Well, there is a value field in the encryption IE, it is currently 1
to denote AES, it could be set to 2 to denote the alternate packing.

However I'm not enough of a crypto person to know if the
this packing is applicable to IAX or if it weakens it fatally.

- Any crypto folks care to discuss with me ?

T.

>
>
> -- 
> Kevin P. Fleming
> Digium, Inc. | Director of Software Technologies
> 445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
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