symmetric encryption broken
smurf at noris.de
Fri Mar 9 22:14:08 CET 2001
Michael H. Warfield:
> Huh... Wait a minute. You're encrypting it once and then
> encrypting it a second time. What are you trying to accomplish here?
Some ciphers are symmetric. If you DES-encrypt something, and then "encrypt"
the ciphertext again, you magically get the plaintext back.
The same thing works with any cipher algorithm which computes a secure
hash and XORs it with the plaintext. (You could use MD5 as a cipher that
Matthias Urlichs | noris network AG | http://smurf.noris.de/
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