RFC 2612 (rfc2612) - Page 1 of 19

The CAST-256 Encryption Algorithm

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Network Working Group                                        C. Adams
Request for Comments: 2612                               J. Gilchrist
Category: Informational                          Entrust Technologies
                                                            June 1999


                   The CAST-256 Encryption Algorithm

Status of this Memo

   This memo provides information for the Internet community.  It does
   not specify an Internet standard of any kind.  Distribution of this
   memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (1999).  All Rights Reserved.

Abstract

   There is always a desire in the Internet community for unencumbered
   encryption algorithms with a range of key sizes that can provide
   security for a variety of cryptographic applications and protocols.

   This document describes an existing algorithm that can be used to
   satisfy this requirement.  Included are a description of the cipher
   and the key scheduling algorithm, the s-boxes, and a set of test
   vectors (Appendix A).

Table of Contents

   Abstract........................................................1
   1. Introduction.................................................2
   2. CAST-256 Algorithm Specification.............................2
   3. Cipher Naming................................................8
   4. Cipher Usage.................................................8
   5. Security Considerations......................................8
   6. References...................................................9
   7. Authors' Addresses...........................................9
   Appendix A. Test Vectors.......................................10
   Full Copyright Statement.......................................19










Adams & Gilchrist            Informational
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