RFC 3174 (rfc3174) - Page 1 of 22

US Secure Hash Algorithm 1 (SHA1)

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Network Working Group                                   D. Eastlake, 3rd
Request for Comments: 3174                                      Motorola
Category: Informational                                         P. Jones
                                                           Cisco Systems
                                                          September 2001


                   US Secure Hash Algorithm 1 (SHA1)

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 (2001).  All Rights Reserved.

Abstract

   The purpose of this document is to make the SHA-1 (Secure Hash
   Algorithm 1) hash algorithm conveniently available to the Internet
   community.  The United States of America has adopted the SHA-1 hash
   algorithm described herein as a Federal Information Processing
   Standard.  Most of the text herein was taken by the authors from FIPS
   180-1.  Only the C code implementation is "original".

Acknowledgements

   Most of the text herein was taken from [FIPS 180-1].  Only the C code
   implementation is "original" but its style is similar to the
   previously published MD4 and MD5 RFCs [RFCs 1320, 1321].

   The SHA-1 is based on principles similar to those used by Professor
   Ronald L. Rivest of MIT when designing the MD4 message digest
   algorithm [MD4] and is modeled after that algorithm [RFC 1320].

   Useful comments from the following, which have been incorporated
   herein, are gratefully acknowledged:

      Tony Hansen
      Garrett Wollman








Eastlake & Jones             Informational
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