Friedl, M., Mojzis, J., and S. Josefsson, "Secure Shell (SSH) Key Exchange Method Using Hybrid Streamlined NTRU Prime sntrup761 and X25519 with SHA-512: sntrup761x25519-sha512", RFC 9941, DOI 10.17487/RFC9941, April 2026, <https://www.rfc-editor.org/info/rfc9941/>.