RFC 8709 · PROPOSED STANDARD · 2020
SUN · 14 JUN 2026
Ed25519 and Ed448 Public Key Algorithms for the Secure Shell Protocol
Overview
RFC 8709, “Ed25519 and Ed448 Public Key Algorithms for the Secure Shell Protocol”, is a Proposed Standard document published in February 2020 by B. Harris, L. Velvindron. It updates RFC 4253. The canonical text is published by the RFC Editor.
Abstract
This document describes the use of the Ed25519 and Ed448 digital signature algorithms in the Secure Shell (SSH) protocol. Accordingly, this RFC updates RFC 4253.
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 8709 is hosted at rfc-editor.org. Available in HTML,TXT,PDF,XML.
Relationships to other RFCs
Other RFCs from 2020
- RFC 8708 Use of the HSS/LMS Hash-Based Signature Algorithm in the Cryptographic Message Syntax
- RFC 8710 Multipart Content-Format for the Constrained Application Protocol
- RFC 8707 Resource Indicators for OAuth 2.0
- RFC 8711 Structure of the IETF Administrative Support Activity, Version 2.0
- RFC 8706 Restart Signaling for IS-IS
- RFC 8712 The IETF-ISOC Relationship
- RFC 8705 OAuth 2.0 Mutual-TLS Client Authentication and Certificate-Bound Access Tokens
- RFC 8713 IAB, IESG, IETF Trust, and IETF LLC Selection, Confirmation, and Recall Process: Operation of the IETF Nominating and Recall Committees