CH3 security

What is symmetric encryption also known as?

• • A) Public-key encryption

• • B) Asymmetric encryption

• • C) Single-key encryption

• D) Hash encryption
  

Which of the following is NOT an ingredient in symmetric encryption?

• Plaintext

• • Public key

• Secret key

• Ciphertext

What is the Feistel cipher structure primarily associated with?

• AES

• RSA

• DES

• MD5

Which algorithm is considered a variation of the Feistel network?

• AES

• DES

• RC4

• MD5

What key length is NOT used in AES?

• • A) 128-bit

• • B) 192-bit

• • C) 256-bit

• D) 512-bit
  

Which of the following modes of operation is NOT part of symmetric encryption?

• • A) ECB

• • B) CBC

• • C) RSA

• • D) CTR

What is the purpose of the Initialization Vector (IV) in the Cipher Block Chaining (CBC) mode?

• • A) To encrypt plaintext

• • B) To generate the secret key

• • C) To ensure unique ciphertext for repeated plaintext blocks

• • D) To calculate hash values