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Re: something I've always wondered




> Does DES (or name your favorite encryption algorithm) produce as output  
> all possible cyphertexts of length L, given all possible conbinations of  
> keys and plaintexts of length L?

Choose any cyphertext and a random key and decrypt the cyphertext with that
key. Now you have a key and a plaintext which produce this cyphertext.

Hadmut