RFC 4302 · PROPOSED STANDARD · 2005
WED · 29 JUL 2026
IP Authentication Header
Overview
RFC 4302, “IP Authentication Header”, is a Proposed Standard document published in December 2005 by S. Kent. It obsoletes RFC 2402. The canonical text is published by the RFC Editor.
Abstract
This document describes an updated version of the IP Authentication Header (AH), which is designed to provide authentication services in IPv4 and IPv6. This document obsoletes RFC 2402 (November 1998). [STANDARDS-TRACK]
What “Proposed Standard” means
An entry-level standards-track specification: stable, peer-reviewed and a solid basis for implementation, though it may still evolve before becoming an Internet Standard.
Read this RFC
The canonical text of RFC 4302 is hosted at rfc-editor.org. Available in TXT,HTML.
Relationships to other RFCs
Other RFCs from 2005
- RFC 4301 Security Architecture for the Internet Protocol
- RFC 4303 IP Encapsulating Security Payload
- RFC 4304 Extended Sequence Number Addendum to IPsec Domain of Interpretation for Internet Security Association and Key Management Protocol
- RFC 4305 Cryptographic Algorithm Implementation Requirements for Encapsulating Security Payload and Authentication Header
- RFC 4298 RTP Payload Format for BroadVoice Speech Codecs
- RFC 4306 Internet Key Exchange Protocol
- RFC 4297 Remote Direct Memory Access over IP Problem Statement
- RFC 4307 Cryptographic Algorithms for Use in the Internet Key Exchange Version 2