RFC 1186 · INFORMATIONAL · 1990
SUN · 14 JUN 2026
MD4 Message Digest Algorithm
Overview
RFC 1186, “MD4 Message Digest Algorithm”, is an Informational document published in October 1990 by R.L. Rivest. It has been obsoleted by RFC 1320 — refer to the newer document for the authoritative version. The canonical text is published by the RFC Editor.
Abstract
This RFC is the specification of the MD4 Digest Algorithm. If you are going to implement MD4, it is suggested you do it this way. This memo is for informational use and does not constitute a standard.
What “Informational” means
Published for the general information of the community. It does not define an IETF standard and carries no standards-track status.
Read this RFC
The canonical text of RFC 1186 is hosted at rfc-editor.org. Available in TXT,HTML.
Relationships to other RFCs
Other RFCs from 1990
- RFC 1185 TCP Extension for High-Speed Paths
- RFC 1187 Bulk Table Retrieval with the SNMP
- RFC 1184 Telnet Linemode Option
- RFC 1188 Proposed Standard for the Transmission of IP Datagrams over FDDI Networks
- RFC 1183 New DNS RR Definitions
- RFC 1189 Common Management Information Services and Protocols for the Internet
- RFC 1190 Experimental Internet Stream Protocol: Version 2
- RFC 1181 RIPE Terms of Reference