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CPEH-001 · Question #951

Tony wants to integrate a 128-bit symmetric block cipher with key sizes of 128,192, or 256 bits into a software program, which involves 32 rounds of computational operations that include…

The correct answer is D. serpent. See the full explanation below for the reasoning.

Question

Tony wants to integrate a 128-bit symmetric block cipher with key sizes of 128,192, or 256 bits into a software program, which involves 32 rounds of computational operations that include substitution and permutation operations on four 32-bit word blocks using 8-variable S-boxes with 4-bit entry and 4-bit exit. Which of the following algorithms includes all the above features and can be integrated by Tony into the software program?

Options

  • ATEA
  • BCAST-128
  • CRC5
  • Dserpent

How the community answered

(59 responses)
  • A
    10% (6)
  • B
    2% (1)
  • C
    5% (3)
  • D
    83% (49)

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