Clarifications for Ed25519, Ed448, X25519, and X448 Algorithm Identifiers
RFC 9295, “Clarifications for Ed25519, Ed448, X25519, and X448 Algorithm Identifiers”, is a Proposed Standard document published in September 2022 by S. Turner, S. Josefsson, D. McCarney, T. Ito. It updates RFC 8410. The canonical text is published by the RFC Editor.
Abstract
This document updates RFC 8410 to clarify existing semantics, and specify missing semantics, for key usage bits when used in certificates that support the Ed25519, Ed448, X25519, and X448 Elliptic Curve Cryptography algorithms.
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.
The canonical text of RFC 9295 is hosted at rfc-editor.org. Available in HTML,TXT,PDF,XML.
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