OpenPGP
This specification has been revised 5 times since RFC 1991 (1996). Each document below formally obsoleted the one before it; the versions still in force are listed first.
Revision timeline
Current version — implement against this
Superseded versions — historical reference only
- RFC 1991PGP Message Exchange FormatsObsoletedAugust 1996informationalreplaced by RFC4880
- RFC 2440OpenPGP Message FormatObsoletedNovember 1998proposed standardreplaced by RFC4880
- RFC 4880OpenPGP Message FormatObsoletedNovember 2007proposed standardreplaced by RFC9580
- RFC 5581The Camellia Cipher in OpenPGPObsoletedJune 2009informationalreplaced by RFC9580
- RFC 6637Elliptic Curve Cryptography (ECC) in OpenPGPObsoletedJune 2012proposed standardreplaced by RFC9580
This lineage is derived automatically from the “obsoletes” relationships recorded in the public RFC Editor index — no editorial judgement is applied to the ordering. The most recent document in the chain is RFC 9580 (July 2024).