quiz

Symmetric Key Cryptography

Symmetric-Key Cryptography: An Overview

1. Which of the following is an example of a symmetric encryption algorithm?

  • A) RSA
  • B) DES
  • C) ECC
  • D) DSA
B) DES Explanation

2. Which of the following is a characteristic of block ciphers in symmetric key cryptography?

  • A) Encrypts data one bit at a time.
  • B) Creates an arbitrarily long stream of key material.
  • C) Encrypts fixed-size blocks of plaintext.
  • D) Do not use any keys for encryption.
C) Encrypts fixed-size blocks of plaintext. Explanation

3. Which of the following symmetric key algorithms has replaced DES as the standard encryption algorithm?

  • A) RC4
  • B) Triple DES (3DES)
  • C) AES
  • D) Blowfish
C) AES Explanation

4. Which of the following is an example of a stream cipher?

  • A) AES
  • B) DES
  • C) SHA-256
  • D) RC4
D) RC4 Explanation

5. What is the key length used by the Data Encryption Standard (DES)?

  • A) 128 bits
  • B) 64 bits
  • C) 56 bits
  • D) 256 bits
C) 56 bits Explanation

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