Can you clarify when data compression is used?
dshaw at jabberwocky.com
Mon Feb 4 15:36:00 CET 2008
On Sun, Feb 03, 2008 at 11:48:13PM -0600, 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 doesn't compress particularly well. Plus, there is
a minor (as in "don't rely on it, but it's nice to have") security
improvement in encrypting already-compressed data.
> I can't seem to find any documentation discussing this.
RFC-4880 documents this.
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