lcs Mixmaster Remailer writes:
 > Second, quantum computers will already threaten much cryptography in
 > use today.  They would be able to factor numbers and find discrete logs,
 > breaking the public key systems.  For symmetric ciphers, they effectivelly
 > halve the key length, which might even allow breaking 128 bit ciphers.
 > (Which is why the new AES will support keys up to 256 bits.)
 > 
Can you explain the halfing effect on the key length? Or may be you
have some pointers to the literature on that?

Ciao,
Ulrich
-- 
Ulrich Kuehn ------------------ [EMAIL PROTECTED]
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        http://wwwmath.uni-muenster.de/~kuehn/

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