RFC 1423 · HISTORIC · 1993
SUN · 14 JUN 2026
Privacy Enhancement for Internet Electronic Mail: Part III: Algorithms, Modes, and Identifiers
Overview
RFC 1423, “Privacy Enhancement for Internet Electronic Mail: Part III: Algorithms, Modes, and Identifiers”, is a Historic document published in February 1993 by D. Balenson. It obsoletes RFC 1115. The canonical text is published by the RFC Editor.
Abstract
This document provides definitions, formats, references, and citations for cryptographic algorithms, usage modes, and associated identifiers and parameters used in support of Privacy Enhanced Mail (PEM) in the Internet community. [STANDARDS-TRACK]
What “Historic” means
A specification that has been superseded or is otherwise no longer recommended for use.
Read this RFC
The canonical text of RFC 1423 is hosted at rfc-editor.org. Available in TXT,HTML.
Relationships to other RFCs
Other RFCs from 1993
- RFC 1422 Privacy Enhancement for Internet Electronic Mail: Part II: Certificate-Based Key Management
- RFC 1424 Privacy Enhancement for Internet Electronic Mail: Part IV: Key Certification and Related Services
- RFC 1421 Privacy Enhancement for Internet Electronic Mail: Part I: Message Encryption and Authentication Procedures
- RFC 1425 SMTP Service Extensions
- RFC 1420 SNMP over IPX
- RFC 1426 SMTP Service Extension for 8bit-MIMEtransport
- RFC 1419 SNMP over AppleTalk
- RFC 1427 SMTP Service Extension for Message Size Declaration