Counter with Cipher Block Chaining-Message Authentication Code

nounid 2034·updated May 9, 2026

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A mode of operation for a symmetric key block cipher algorithm. It combines the techniques of the Counter (CTR) mode and the Cipher Block Chaining-Message Authentication Code (CBC-MAC) algorithm to provide assurance of the confidentiality and the authenticity of computer data.

MWE

Classifications

per-axis with provenance

Entity Type

Control85%llm-generatedllm:claude-haiku-4-5

Sensitivity

unclassified

Information Class

unclassified

Variants

4 surface forms

acronym: CCM
plural: Counter with Cipher Block Chaining-Message Authentication Codes
possessive: Counter with Cipher Block Chaining-Message Authentication Code's
pluralpossessive: Counter with Cipher Block Chaining-Message Authentication Codes'

Framework definitions

2 senses across 2 frameworks

NISTIR 7298: Glossary of Key Information Security Terms, Revision 21 senseview framework →

§1: A mode of operation for a symmetric key block cipher algorithm. It combines the techniques of the Counter (CTR) mode and the Cipher Block Chaining-Message Authentication Code (CBC-MAC) algorithm to provide assurance of the confidentiality and the authenticity of computer data.

NIST SP 800-38C1 senseview framework →

§1: A mode of operation for a symmetric key block cipher algorithm. It combines the techniques of the Counter (CTR) mode and the Cipher Block Chaining-Message Authentication Code (CBC-MAC) algorithm to provide assurance of the confidentiality and the authenticity of computer data.

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