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Weekly CISSP Exam Questions

Which of the following is NOT a property of Secure Hash Algorithm (SHA)?

A.  Irreversible
B.  Fixed-length Output
C.  Variable-length Output
D.  Collision Resistance

Answer: C
Explanation:
SHA produces a fixed-length output and does not provide variable-length outputs.

  • Irreversible: Hash functions like SHA are one-way functions.
  • Fixed-length Output: Regardless of the input size, the output size remains constant.
  • Variable-length Output: SHA does not have this property; the output is fixed in length.
  • Collision Resistance: It is computationally difficult to find two different inputs that produce the same output.

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