Information Security Quiz
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Questions and Answers

What is the primary purpose of a Feistel cipher's block size?

  • To decrease encryption/decryption speed
  • To increase encryption/decryption speed
  • To achieve greater resistance to brute-force attacks
  • To achieve greater security through diffusion (correct)

    • Why is a larger key size desirable in a Feistel cipher?

  • To achieve greater security through diffusion
  • To decrease encryption/decryption speed
  • To achieve greater resistance to brute-force attacks (correct)
  • To increase encryption/decryption speed

    • What is the tradeoff associated with larger block sizes in a Feistel cipher?

  • Decreased encryption/decryption speed (correct)
  • Increased encryption/decryption speed
  • Reduced security and diffusion
  • Increased resistance to brute-force attacks

    • Why has the new AES chosen a 128-bit block size instead of the traditional 64-bit block size?

    <p>To achieve greater security through diffusion</p> Signup and view all the answers

    What effect does a larger key size have on encryption/decryption speed in a Feistel cipher?

    <p>It decreases encryption/decryption speed</p> Signup and view all the answers

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