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CompTIA Security+ study material · question 462 of 611

An attacker captures an authentication exchange on the network and replays it later to log in. Which property would have prevented this?

  1. Authentication intent
  2. Replay resistance
  3. Non-exportable key material
  4. Phishing resistance
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Answer: B. Replay resistance

Replay resistance ties the exchange to that session so a captured copy cannot be reused.

Source: NIST SP 800-63B Rev. 4 (NIST) — SP 800-63B-4 § 3.2.7 Replay Resistance

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