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Replay attack

nounverified·updated May 9, 2026

The interception of communications, such as an authentication communication, and subsequently impersonation of the sender by retransmitting the intercepted communication.

MWEFederal Financial Institutions Examination Council (FFIEC) IT Examination Handbook Infobase, Glossary

Senses

NISTIR 7298: Glossary of Key Information Security Terms, Revision 2

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.

NIST SP 800-171r3attested usage pack match

No definition is given in NIST SP 800-171r3. The term is attested in use at 1 citation in that document; a definition is pending curation.

Classifications

Entity Type

Threat95%llm-generatedllm:claude-haiku-4-5
?unassignedlast reviewed

Sensitivity

unclassified

Information Class

unclassified

Variants

alternatephrasing
Replay Attacks
plural
Replay attacksReplay Attackses
possessive
Replay attack'sReplay Attacks's
pluralpossessive
Replay attacks'Replay Attackses'