New answers tagged feistel-network
DES with 2 rounds is broken. It is trivial to find a way to get the key with much less work than for the full DES (and even that is broken). DES is a Feistel cipher, so we have two halves, the left and the right half. For every round, we do something with the one half and a subkey, and then XOR it with the other half. After that we switch both halves, ...
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