COMPLETE QUESTIONS AND ANSWERS
ALREADY PASSED
◉ Four-Square Cipher
Answer: four squares of alphabet are created and two characters of
plain text are mapped to two characters of cipher text
◉ Enigma Machine
Answer: An example of a one time pad encryption device.
◉ Data Encryption Standard (DES)
Answer: Symmetric, Block size: 64, Key size: 56, Rounds: 16
◉ Triple Data Encryption Standard (3DES)
Answer: Symmetric, Block size: 64, Key size: 112, Rounds: 48
◉ Advanced Encryption Standard (AES)
Answer: Symmetric, Block size: 128, Key Size: 128,192,256, Rounds:
10, 12, 14
, ◉ International Data Encryption Algorithm (IDEA)
Answer: Symmetric, Block Size: 64, Key Size: 128, Rounds: 17+
◉ Skipjack
Answer: Symmetric, Block Size: 64, Key Size: 80, Rounds: 32
◉ Blowfish
Answer: Symmetric, Block Size: 64, Key Size: 128, 192, 256, Rounds:
16
◉ Twofish
Answer: Symmetric, Block Size: 128, Key Size: 128, 192, 256,
Rounds: 16
◉ Camelia
Answer: Symmetric, Block Size 128, Key Size: 128, 192, 256, Rounds:
18/24
◉ Rivest Cipher 5 (RC5)
Answer: Symmetric, Block Size: 32, 64, 128, Key Size: 0 - 2,040,
Rounds: 0-255
◉ Rivest Cipher 2 (RC2)