Information and Network Security MCQs with answers Page - 10

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Q. The inverse transformation matrix times the forward transformation matrix equals the identity matrix.

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

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Q. How many round keys are generated in the AES algorithm?

  • (A) 12
  • (B) 11
  • (C) 10
  • (D) 8

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Q. DES follows_________.

  • (A) SP Networks
  • (B) Feistel Cipher Structure
  • (C) Caesars Cipher
  • (D) Hash Algorithm

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Q. The DES Algorithm Cipher System consists of ____________rounds (iterations) each with a round key.

  • (A) 16
  • (B) 9
  • (C) 12
  • (D) 18

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Q. The DES algorithm has a key length of ______.

  • (A) 16 Bits
  • (B) 32 Bits
  • (C) 64 Bits
  • (D) 128 Bits

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Q. In the DES algorithm the round key is __________ bit and the Round Input is ____________bits.

  • (A) 48, 32
  • (B) 32, 32
  • (C) 56, 24
  • (D) 64,32

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Q. In the DES algorithm the Round Input is 32 bits, which is expanded to 48 bits via ____________.

  • (A) Addition of ones
  • (B) Addition of zeros
  • (C) Duplication of the existing bits
  • (D) Scaling of the existing bits

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Q. The Initial Permutation table/matrix is of size _____.

  • (A) 4×8
  • (B) 8×8
  • (C) 12×8
  • (D) 16×8

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Q. The number of unique substitution boxes in DES after the 48 bit XOR operation are___.

  • (A) 4
  • (B) 8
  • (C) 12
  • (D) 16

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Q. What is the number of possible 3 x 3 affine cipher transformations?

  • (A) 840
  • (B) 168
  • (C) 1344
  • (D) 1024

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