INTERNET - DRAFT US SHA - 1 April 2001

The United States of America has adopted the SHA-1 hash algorithm described herein as a Federal Information Processing Standard. The purpose of this document is to make it conveniently available to the Internet community. Most of the text herein was taken by the authors from FIPS 180-1. Only the C code implementation is "original" and that is similar to the MD2/MD4/MD5 RFCs. D. Eastlake 3rd, P. Jones [Page 1] INTERNET-DRAFT US SHA-1 April 2001 Acknowledgements Almost all of the text herein was taken by the authors from [FIPS 180-1]. Only the C code implementation is "original" but its style is similar to the previously published MD2, MD4, and MD5 RFCs [RFCs 1319, 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 closely modelled after that algorithm [RFC 1320].