From 5a442cec92c0efd6fffb4af84bf99c70af248ef3 Mon Sep 17 00:00:00 2001 From: "djm@openbsd.org" Date: Mon, 11 May 2020 02:11:29 +0000 Subject: upstream: clarify role of FIDO tokens in multi-factor authentictation; mostly from Pedro Martelletto OpenBSD-Commit-ID: fbe05685a1f99c74b1baca7130c5a03c2df7c0ac --- PROTOCOL.u2f | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'PROTOCOL.u2f') diff --git a/PROTOCOL.u2f b/PROTOCOL.u2f index 917e669c..fd4325b3 100644 --- a/PROTOCOL.u2f +++ b/PROTOCOL.u2f @@ -39,6 +39,13 @@ the key handle be supplied for each signature operation. U2F tokens primarily use ECDSA signatures in the NIST-P256 field, though the FIDO2 standard specifies additional key types, including one based on Ed25519. +Use of U2F security keys does not automatically imply multi-factor +authentication. From sshd’s perspective, a security key constitutes a +single factor of authentication, even if protected by a PIN or biometric +authentication. To enable multi-factor authentication in ssh, please +refer to the AuthenticationMethods option in sshd_config(5). + + SSH U2F Key formats ------------------- -- cgit v1.2.1