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Re: Granularity of authentication in swIPe
Ashar,
The ability to use the last block as an IV varies depending on
the crypto interface. Some implementations allow it, others don't.
You don't want to hold up a packet waiting for the requisite
precursors to arrive, since that would violate IP and would kill
applications like packet voice and video. So, if you don't carry
an IV on each packet, you run the risk that out of order arrival
and/or packet loss will cause problems.
Steve
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