Internet X.509 Public Key Infrastructure: Logotypes in X.509 Certificates

This specification has been revised 2 times since RFC 3709 (2004). Each document below formally obsoleted the one before it; the versions still in force are listed first.

Revision timeline

  1. RFC 3709 (2004)
  2. RFC 6170 (2011)
  3. RFC 9399 (2023)

Current version — implement against this

Superseded versions — historical reference only

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 9399 (May 2023).