ECCouncil 212-81 Question Answer
Which of the following uses an 80 bit key on 64 bit blocks?
Skipjack
Twofish
DES
AES
Explanation
https://en.wikipedia.org/wiki/Skipjack_(cipher)
Skipjack uses an 80-bit key to encrypt or decrypt 64-bit data blocks. It is an unbalanced Feistel network with 32 rounds.
TESTED 13 Jul 2025
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