CISSP Practice question #4

Which is true about Twofish?
A: It is a 64bit block cipher, with 56bit keys.
B: It is a 64bit block cipher with a 112bit key.
C: It is a 64bit block cipher with a 128bit key.
D: It is a 128bit block cipher with 128, 192 or 256bit keys.

CBK 3: Security Engineering
Source: ThorTeaches.com practice tests

Answer


D: Twofish. Uses Feistel. Symmetric, block cipher 128bit blocks, key length 128, 192, 256 bits. Considered secure.

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