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| author | djm@openbsd.org <djm@openbsd.org> | 2020-05-11 02:11:29 +0000 |
|---|---|---|
| committer | Damien Miller <djm@mindrot.org> | 2020-05-27 10:09:18 +1000 |
| commit | 5a442cec92c0efd6fffb4af84bf99c70af248ef3 (patch) | |
| tree | 0f165a28427b38ca88f9c9ec03565fd402d5dec6 /PROTOCOL.u2f | |
| parent | ecb2c02d994b3e21994f31a70ff911667c262f1f (diff) | |
| download | openssh-git-5a442cec92c0efd6fffb4af84bf99c70af248ef3.tar.gz | |
upstream: clarify role of FIDO tokens in multi-factor
authentictation; mostly from Pedro Martelletto
OpenBSD-Commit-ID: fbe05685a1f99c74b1baca7130c5a03c2df7c0ac
Diffstat (limited to 'PROTOCOL.u2f')
| -rw-r--r-- | PROTOCOL.u2f | 7 |
1 files changed, 7 insertions, 0 deletions
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 ------------------- |