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An annotated guide to the binary structure of OpenSSH private keys, explaining each chunk, RSA parameters, and padding.
GitHub's SSH server now rejects direct-signed publickey requests, requiring a .pub file for private keys; the fix is to generate the .pub file from the private key using ssh-keygen.
OpenSSH 10.4 was released on 2026-07-06, including security fixes and experimental support for a composite post-quantum signature scheme combining ML-DSA 44 and Ed25519.
OpenSSH 10.4/10.4p1 released with security fixes and experimental post-quantum signature support.
In August 2002, the OpenSSH source tarballs on the OpenBSD FTP server were replaced with trojaned versions, leading to a security incident and response by the OpenBSD team.