RFC 9399 · PROPOSED STANDARD · 2023
SUN · 14 JUN 2026
Internet X.509 Public Key Infrastructure: Logotypes in X.509 Certificates
Overview
RFC 9399, “Internet X.509 Public Key Infrastructure: Logotypes in X.509 Certificates”, is a Proposed Standard document published in May 2023 by S. Santesson, R. Housley, T. Freeman, L. Rosenthol. It obsoletes RFC 3709, RFC 6170. The canonical text is published by the RFC Editor.
Abstract
This document specifies a certificate extension for including logotypes in public key certificates and attribute certificates. This document obsoletes RFCs 3709 and 6170.
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 9399 is hosted at rfc-editor.org. Available in HTML,TXT,PDF,XML.
Relationships to other RFCs
Other RFCs from 2023
- RFC 9398 A YANG Data Model for Internet Group Management Protocol and Multicast Listener Discovery Proxy Devices
- RFC 9400 Guidelines for the Organization of Fully Online Meetings
- RFC 9397 Trusted Execution Environment Provisioning Architecture
- RFC 9401 The Addition of the Death Flag to TCP
- RFC 9396 OAuth 2.0 Rich Authorization Requests
- RFC 9402 Concat Notation
- RFC 9395 Deprecation of the Internet Key Exchange Version 1 Protocol and Obsoleted Algorithms
- RFC 9403 A YANG Data Model for RIB Extensions