very short plaintexts symmetrically encrypted

Benjamin Donnachie benjamin at py-soft.co.uk
Fri Jan 8 21:03:53 CET 2010


2010/1/8  <vedaal at hush.com>:
> At any rate, it seems disturbingly easy to distinguish between
> symmetrically encrypted messages having only the word 'yes' or 'no'
> just by 'looking' at the ciphertext.

i. Don't send such short messages
ii. Don't use symmetric encryption.

Ben



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