Information and Network Security MCQs with answers Page - 5

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Q. Which mode requires the implementation of only the encryption algorithm?

  • (A) OF
  • (B) B CTR
  • (C) CBC
  • (D) ECB

A

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Q. Which of the following modes of operation does not involve feedback?

  • (A) OF
  • (B) B CTR
  • (C) CBC
  • (D) ECB

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Q. Which of the following is a natural candidates for stream ciphers?

  • (A) OF
  • (B) B ECB
  • (C) CBC
  • (D) CFB

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Q. Which one of the following is not a cryptographic algorithm- JUPITER, Blowfish, RC6, Rijndael and Serpent?

  • (A) Rijndael
  • (B) Serpent
  • (C) Blowfish
  • (D) JUPITER

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Q. Which algorithm among- MARS, Blowfish, RC6, Rijndael and Serpent -was chosen as the AES algorithm?

  • (A) Rijndael
  • (B) RC6
  • (C) Blowfish
  • (D) MARS

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Q. How many rounds does the AES-192 perform?

  • (A) 16
  • (B) 12
  • (C) 14
  • (D) 10

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Q. What is the expanded key size of AES-192?

  • (A) 60 words
  • (B) 32 words
  • (C) 52 words
  • (D) 44 words

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Q. The 4×4 byte matrices in the AES algorithm are called_______.

  • (A) Permutations
  • (B) Transitions
  • (C) Words
  • (D) States

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Q. In AES the 4×4 bytes matrix key is transformed into a keys of size __________.

  • (A) 60 words
  • (B) 32 words
  • (C) 52 words
  • (D) 44 words

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Q. For the AES-128 algorithm there are __________ similar rounds and _________ round is different.

  • (A) 9 ; the last
  • (B) 8 ; the first and last
  • (C) 10 ; no
  • (D) 2 pair of 5 similar rounds ; every alternate

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