Lecture 2 - Secret Key Encryption - Block Cipher Modes

Question 1

Will the same plaintext always give the same ciphertext

Answer 1

Yes

Question 2

What is cipher block chaining

Answer 2

In a cipher block chaining process, data is encrypted in specific blocks, and each block is dependent on the blocks before it for decryption

Question 3

Electronic Code Book is susceptible to what kind of attack?

Answer 3

Replay attack

Question 4

For Cipher Block Chaining (CBC), what is XOR’d with the plaintext?

Answer 4

Initialization Vectors (IV)