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Re: xor data hiding?
J. Michael Diehl <[email protected]> says:
> I heard something interesting which made me think. (gasp)
>
> I heard that if you encrypt a file with the xor encryption alg.
> multiple times with different keys, you get an encrypted file with a
> coorisponding effective key which has some interesting properties. The key
> in such a system would have a length equal to the Least Common Multiple of
> the lengths of the original key.
Sadly, the Friedmans already cracked the "multiple repeating xored
keys" cypher a while back -- about fifty years ago.
Don't be embarassed, by the way -- everyone comes up with cyphers that
have been cracked before. However, I would suggest reading "The
Codebreakers" and the current literature before proposing new systems.
Perry