Cryptography Extra 1 (Block Cipers)

Question 1

(block cipher) - block size 128-bits, 10(128), 12(192), 14(256) rounds, substitution-permutation

Answer 1

AES

Question 2

(block cipher) - key size 128, 192, 256 - block size : 128-bits, 32 rounds, substitution-permutation

Answer 2

Serpent

Question 3

(block cipher) - key size up to 256-bits, block size : 128-bits, 16 rounds Fiestel

Answer 3

Twofish (block cipher)

Question 4

(block cipher) - key size up to 2048-bits, block size : 32/64/128, rounds up to 255

Answer 4

RC5 & RC6

Question 5

(block cipher) - key size 128-bits, block size : 64-bits, 8 rounds, Lai-Massey-Scheme

Answer 5

IDEA

Question 6

(block cipher) - key size 128-bits, block size : 64-bits, 64 rounds, Feistel

Answer 6

TEA (block cipher)

Question 7

(block cipher) - key size 128-bits, block size : 64-bits, 6 rounds

Answer 7

SHARK (block cipher)

Question 8

(block cipher) - key size 128 or 256-bits, block size : 64-bits, rounds 12 < 80 - 16 > 80, PGP 8 bit rounds.

Answer 8

CAST

Question 9

(block cipher) - key size 32-448-bits, block size : 64-bits, 16 rounds, Feistel in brcrypt, crashplan, cryptodisk, drive crypt

Answer 9

BLOWFISH

Question 10

(block cipher) - key size 56-bits, block size : 64-bits, 16 rounds, Feistel

Answer 10

DES / 3DES