RFC 4434 · PROPOSED STANDARD · 2006
SUN · 14 JUN 2026
The AES-XCBC-PRF-128 Algorithm for the Internet Key Exchange Protocol
Overview
RFC 4434, “The AES-XCBC-PRF-128 Algorithm for the Internet Key Exchange Protocol”, is a Proposed Standard document published in February 2006 by P. Hoffman. It obsoletes RFC 3664. The canonical text is published by the RFC Editor.
Abstract
Some implementations of IP Security (IPsec) may want to use a pseudo-random function derived from the Advanced Encryption Standard (AES). This document describes such an algorithm, called AES-XCBC-PRF-128. [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 4434 is hosted at rfc-editor.org. Available in TXT,HTML.
Relationships to other RFCs
Other RFCs from 2006
- RFC 4433 Mobile IPv4 Dynamic Home Agent Assignment
- RFC 4435 A Framework for the Usage of Internet Media Guides
- RFC 4432 RSA Key Exchange for the Secure Shell Transport Layer Protocol
- RFC 4436 Detecting Network Attachment in IPv4
- RFC 4431 The DNSSEC Lookaside Validation DNS Resource Record
- RFC 4437 Web Distributed Authoring and Versioning Redirect Reference Resources
- RFC 4430 Kerberized Internet Negotiation of Keys
- RFC 4438 Fibre-Channel Name Server MIB