Cryptography DES Quiz

What does DES stand for?

• Data Encoding System

• Dynamic Encryption Standard

• Digital Encryption System

• Data Encryption Standard

What is the block size of DES?

• 64 bits

• 256 bits

• 128 bits

• 32 bits

How many rounds of encryption does DES use?

• 8

• 16

• 4

• 32

What is the size of the key in DES?

• 56 bits

• 64 bits

• 128 bits

• 32 bits

What type of encryption algorithm is DES?

• Symmetric key encryption

• Asymmetric key encryption

• Public key encryption

• Hashing algorithm

How many subkeys are generated in the key generation process of DES?

• 16

• 32

• 8

• 4

What is the size of the input to the key generation process in DES?

• 64 bits

• 256 bits

• 32 bits

• 128 bits

What is the size of the output from the key generation process in DES?

• 128 bits

• 64 bits

• 56 bits

• 48 bits

What is the purpose of the permutation in the key generation process of DES?

• To create a subkey for encryption and decryption

• To compress the key

• To increase the key length

• To generate random numbers