IP Authentication Header

nouncandidate·updated May 12, 2026

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Protocol used to provide connectionless integrity and data origin authentication for IP datagrams (hereafter referred to as just integrity) and to provide protection against replays. (RFC 4302). Scope Note: AH ensures data integrity with a checksum that a message authentication code, such as MD5, generates. To ensure data origin authentication, AH includes a secret shared key in the algorithm that it uses for authentication. To ensure replay protection, AH uses a sequence number field within the IP authentication header.

MWE

Classifications

per-axis with provenance

Entity Type

Network0%rule-basedmulti_axis_classifier_low_confidence.v1

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Sensitivity

—60%llm-generatedllm:claude-haiku-4-5

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Information Class

—50%llm-generatedllm:claude-haiku-4-5

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Variants

4 surface forms

acronym: AH
plural: IP Authentication Headers
possessive: IP Authentication Header's
pluralpossessive: IP Authentication Headers'

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