RFC 9941 · INFORMATIONAL · 2026
MON · 27 JUL 2026
Secure Shell Key Exchange Method Using Hybrid Streamlined NTRU Prime sntrup761 and X25519 with SHA-512: sntrup761x25519-sha512
Overview
RFC 9941, “Secure Shell Key Exchange Method Using Hybrid Streamlined NTRU Prime sntrup761 and X25519 with SHA-512: sntrup761x25519-sha512”, is an Informational document published in April 2026 by M. Friedl, J. Mojzis, S. Josefsson. The canonical text is published by the RFC Editor.
Abstract
This document describes a widely deployed hybrid key exchange method in the Secure Shell (SSH) protocol that is based on Streamlined NTRU Prime sntrup761 and X25519 with SHA-512.
What “Informational” means
Published for the general information of the community. It does not define an IETF standard and carries no standards-track status.
Read this RFC
The canonical text of RFC 9941 is hosted at rfc-editor.org. Available in HTML,TXT,PDF,XML.
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