Data Encryption Standards Quiz

What is the key length of the Data Encryption Standard (DES)?

• 64 bits

• 56 bits

• 128 bits

• 32 bits

How many rounds does the DES encryption process consist of?

• 16

• 12

• 10

• 20

What is the purpose of the initial permutation (IP) in DES?

• To generate keys

• To rearrange bits

• To discard bits

• To encrypt the data

In DES, how is the 56-bit key derived from the initial 64-bit key?

• By adding bits

• By discarding every 8th bit

• By reversing the bits

• By shifting bits

What is the function of the S-Box in the DES encryption process?

• To permute the bits

• To generate the final output

• To perform substitution

• To expand the key

What does Triple DES (3DES) use to enhance security?

• A longer key

• Multiple rounds of DES

• A larger block size

• Different algorithms

What is the block size used in the Advanced Encryption Standard (AES)?

• 64 bits

• 128 bits

• 256 bits

• 512 bits

How many rounds does AES perform with a 256-bit key?

• 16

• 10

• 12

• 14

Which step is NOT part of the AES encryption process?

• MixColumns

• Key Generation

• ShiftRows

• SubBytes

What is the purpose of the Add Round Key step in AES?

• To mix columns

• To shift rows

• To substitute bytes

• To XOR with the round key