An easy modification to enable quantum safety first appeared in tinyssh, using one of the DJB NTRU Prime algorithms. OpenSSH quietly adopted the tinyssh approa

An easy modification to enable quantum safety first appeared in tinyssh, using one of the DJB NTRU Prime algorithms. OpenSSH quietly adopted the tinyssh approach as an experimental feature. Some time later, after interaction with DJB, the OpenSSH algorithm for NTRU was changed, and tinyssh followed suit. If you want quantum-secure Ed25519, then enable sntrup761x25519 on a supported client and server. https://tinyssh.org/ https://tinyssh.org/