RFC 1544 · PROPOSED STANDARD · 1993
WED · 29 JUL 2026
The Content-MD5 Header Field
Overview
RFC 1544, “The Content-MD5 Header Field”, is a Proposed Standard document published in November 1993 by M. Rose. It has been obsoleted by RFC 1864 — refer to the newer document for the authoritative version. The canonical text is published by the RFC Editor.
Abstract
This memo defines the use of an optional header field, Content-MD5, which may be used as a message integrity check (MIC), to verify that the decoded data are the same data that were initially sent. [STANDARDS-TRACK]
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 1544 is hosted at rfc-editor.org. Available in TXT,HTML.
Relationships to other RFCs
Other RFCs from 1993
- RFC 1543 Instructions to RFC Authors
- RFC 1545 FTP Operation Over Big Address Records
- RFC 1542 Clarifications and Extensions for the Bootstrap Protocol
- RFC 1546 Host Anycasting Service
- RFC 1541 Dynamic Host Configuration Protocol
- RFC 1547 Requirements for an Internet Standard Point-to-Point Protocol
- RFC 1540 Internet Official Protocol Standards
- RFC 1548 The Point-to-Point Protocol