Can you clarify when data compression is used?

Robert J. Hansen rjh at
Mon Feb 4 08:07:46 CET 2008

Kevin Hilton wrote:
> Is the data compression algorithm applied to the text prior to being
> converted to ciphertext, or is the ciphertext compressed, or is it the
> combination of the ciphertext and encrypted session key that is
> compressed?

Prior.  Ciphertext from a strong algorithm cannot be compressed.

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