Nicolas Roumiantzeff wrote:
>
> Could you describe this "meet-in-the-middle" attack on the 3-DES?
OK, well, it's a known-plaintext attack. You encrypt the known plaintext
with all 2^56 possible keys for the first step, and store the results.
You then decrypt the ciphertext with all 2^112 possible keys for the
last two steps and compare to your stored results.
Cheers,
Ben.
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