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The following archive was created by hippie-mail 7.98617-22 on Fri Aug 21 1998 - 17:16:12 ADT
Brian Hurt (brianh@bit3.com)
Tue, 24 Mar 1998 10:00:06 -0600
I'm not sure if this has been thought of yet, but has anyone
considered combining Rivest's Chaffing with random
sequence numbers?
The idea I had was that instead of having monotonically
increasing sequence numbers, use a (cryptographically
secure) pseudo-random number sequence based off of
the MAC key. The chaff would, of course, have random
sequence numbers based off a different sequence of
pseudo-random numbers.
If the receiver does windowing, the messages could be
sent in a limited-random way. For instance, if the
receiver can reorder up to n packets successfully, then
the sender can send the next n packets in any order.
The biggest problem I see with this is that it encodes (more)
information about the MAC in the message sequence.
I'm also not sure if the goverment would consider
this encryption or not (the goverment not being known
for using logic in it's decision making process).
I don't speak for Bit 3.
Brian
The following archive was created by hippie-mail 7.98617-22 on Fri Aug 21 1998 - 17:16:12 ADT