02 Symmetric Algorithms

Question 1

Which symmetric algorithm has the following characteristics:

Block Size: 64 bits
Key Size: 56 bits
Rounds: 16 rounds

Answer 1

DES

Question 2

Which symmetric algorithm has the following characteristics:

Block Size: 64 bits
Key Size: 112 bits
Rounds: 48 rounds

Answer 2

3DES

Question 3

Which symmetric algorithm has the following characteristics:

Block Size: 128 bits
Key Size: 128, 192, or 256 bits
Rounds: 10, 12, or 14 rounds

Answer 3

AES

Question 4

Which symmetric algorithm has the following characteristics:

Block Size: 64 bits
Key Size: 128 bits
Rounds: > 17 rounds

Answer 4

IDEA

Question 5

Which symmetric algorithm has the following characteristics:

Block Size: 64 bits
Key Size: 80 bits

Answer 5

Skipjack

Question 6

These two symmetric algorithms commonly use a key size of 128, 192, or 256 bits.

Answer 6

Blowfish/Twofish

Question 7

Which symmetric algorithm has the following characteristics:

Block Size: 32, 64, or 128 bits
Key Size: variable, 0-2048 bits

Answer 7

RC5

Question 8

Which symmetric algorithm has the following characteristics:

Block Size: 64 bits
Key Size: variable, 1-128 bits, suggested minimum 40 bits

Answer 8

RC2

Question 9

Which symmetric algorithm has the following characteristics:

Block Size: 64 bits
Key Size: 128
Rounds: variable; suggested 64 rounds

Answer 9

XTEA