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Re: compression and encryption
good analysis. one minor note: If a burst is compressed, certainly
uncompressing packet k requires receipt of packets 1..k-1. But if
packet k is lost, is it necessary to retransmit packets 1..k-1? Or
can the history be reset and the process begun again with k set
as 1? The latter would allow a higher packet loss, since the
"average" packet loss would be lower.
No, it isn't necessary to resend 1..k-1 -- those can be decompressed
succesfully without packet k..n. You can't reset the history during
the burst without a network-level ack/retransmit mechanism, which violates
far too many layering assumptions in TCP/IP. My analysis was precisely
for the simple case of ``I send what I want, you receive whatever you can''.