[Cryptography] Compression before encryption?
stephan.neuhaus at zhaw.ch
Fri Jan 9 07:22:14 EST 2015
I have come across the recommendation to "compress before you encrypt",
on the grounds that this makes plaintext recognition through frequency
analysis much harder.
However, compression algorithms surely have easily recognisable headers,
right? Also, I seem to recall a paper that did interesting things with
encrypted compressed plaintext, but I can't recall any details.
So, does any one know what paper I might be referring to? Or is there
any other hard evidence (not personal opinion, however well-informed,
please) that compression before encryption does or does not help?
Thanks in advance,
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