RFC 3664 · PROPOSED STANDARD · 2004

The AES-XCBC-PRF-128 Algorithm for the Internet Key Exchange Protocol

Overview

RFC 3664, “The AES-XCBC-PRF-128 Algorithm for the Internet Key Exchange Protocol”, is a Proposed Standard document published in January 2004 by P. Hoffman. It has been obsoleted by RFC 4434 — refer to the newer document for the authoritative version. 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.

Abstract as published in the RFC, via rfc-editor.org.

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 3664 is hosted at rfc-editor.org. Available in TXT,HTML.

Relationships to other RFCs
Obsoleted by
RFC 4434
Other RFCs from 2004

Who Is Online

In total there are 204 users online: 0 registered, 195 guests and 9 bots.

Most users ever online was 5,555 on 17 Jul 2026, 3:23 am.

Bots: AhrefsBot Applebot Baiduspider Bingbot Googlebot Other Bot Other Crawler PetalBot SemrushBot

Users active in the past 15 minutes. Total registered members: 372