Information and Network Security MCQs with answers Page - 9

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Q. In _____________ a sequence of actions is carried out on this block after a block of plain-text bits is chosen for generating a block of cipher-text bits.

  • (A) Hash functions
  • (B) Vigenere Cipher
  • (C) One-time pa
  • (D) D Block Cipher

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Q. The procedure to add bits to the last block is termed as _________________.

  • (A) Padding
  • (B) Hashing
  • (C) Tuning
  • (D) Decryption

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Q. Which of the following is not an example of a block cipher?

  • (A) DES
  • (B) Caesar cipher
  • (C) Twofish
  • (D) IDEA

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Q. There is an addition of round key before the start of the AES round algorithms.

  • (A) True
  • (B) False
  • (C) none
  • (D) all

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Q. How many computation rounds does the simplified AES consists of?

  • (A) 10
  • (B) 8
  • (C) 2
  • (D) 5

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Q. On comparing AES with DES, which of the following functions from DES does not have an equivalent AES function?

  • (A) Permutation P
  • (B) Swapping of halves
  • (C) XOR of subkey with function f
  • (D) F function

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Q. What is the block size in the Simplified AES algorithm?

  • (A) 36 bits
  • (B) 16 bits
  • (C) 40 bits
  • (D) 8 bits

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Q. What is the key size in the S-AES algorithm?

  • (A) 32 bits
  • (B) 24 bits
  • (C) 16 bits
  • (D) None of the mentioned

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Q. Which of the following is a faulty S-AES step function?

  • (A) Mix Columns
  • (B) Add round key
  • (C) Byte substitution
  • (D) Shift rows

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Q. How many step function do Round 1 and 2 each have in S-AES?

  • (A) 1 and 4
  • (B) 3 and 4
  • (C) Both 4
  • (D) 4 and 3

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