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Re[2]: ESP with stream ciphers




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Rodney Thayer wrote:

>  <stream offset, a 32-bit number in network order>
>  <data>

>So...

>Am I correct this stream offset is a 32-bit animal not a 64-bit animal?

I really think we ought to go with 64 bits. Video conferencing streams 
could persist for some time at quite a high bit rate. 2^32 just doesn't 
seem enough to me. (Unless you could negotiate 32 v 64).

>Also, regardless of how you determine stream offset, what are you going to
>do when you get bytes out of order?

Did you mean packets out of order?
In the case of audio/video streams, reset the algorithm to that bit 
position, and recover from the missing/late packet(s).

John


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Subject: Re: ESP with stream ciphers
From: Rodney Thayer <rodney@sabletech.com>
To: ipsec@tis.com
Date: Tue, 15 Apr 1997 08:44:50 -0400
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