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CompTIA Security+ study material · question 487 of 611

Which property of a hash function does a birthday attack exploit?

  1. The difficulty of finding a preimage
  2. The length of the salt
  3. The probability of two inputs colliding
  4. The speed of the compression function
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Answer: C. The probability of two inputs colliding

Collision probability grows far faster than intuition suggests, which is why output length matters more than it appears.

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