CCM

cryptography

Stands for: Counter with CBC-MAC

An AEAD mode combining counter-mode encryption with a CBC-based authentication tag.

Counter with CBC-MAC (NIST SP 800-38C) is an AEAD construction used where GCM is undesirable, common on constrained links. The CCM_8 variant truncates the tag to 8 bytes to save overhead, which measurably weakens integrity.

Also known as: ccm

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