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Computer Security Resource Center

Computer Security
Resource Center

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replay attacks

Abbreviation(s) and Synonym(s):

None

Definition(s):

  An attack that involves the capture of transmitted authentication or access control information and its subsequent retransmission with the intent of producing an unauthorized effect or gaining unauthorized access.
Source(s):
CNSSI 4009-2015

  An attack in which the Attacker is able to replay previously captured messages (between a legitimate Claimant and a Verifier) to masquerade as that Claimant to the Verifier or vice versa.
Source(s):
NIST SP 800-63-3 under Replay Attack
NIST SP 800-63-2 under Replay Attack [Superseded]