OpenSSH 10.4 ships experimental ML-DSA 44 + Ed25519 signatures, plus the usual SSH bugfix pile.
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01 02 OpenSSH 10.4 release notes: stricter KEX, SFTP/SCP fixes, and an experimental ML-DSA 44 + Ed25519 composite signature.03 OpenSSH 10.4 lands with 8 security fixes and experimental ML-DSA 44 + Ed25519, because crypto entropy wasn't enough.04 Need SSH signatures that are PQ-ish without throwing Ed25519 away? This draft defines the ML-DSA44/Ed25519 composite format.05 What broke in curl's crypto path? This audit walks protocol handlers, TLS backends, reuse, HSTS, SSH keys, and dead ends.06 Guide to PQC OpenSSH/OpenSSL configs, including hybrid and strict TLS modes, because compatibility still gets a vote.