LIBU2F-SERVER(1) LIBU2F-SERVER(1) (NAME) libu2f-server - (U2F) Yubico (SYNOPSIS) libu2f-server [OPTION]... (DESCRIPTION) U2F . . -h, --help -V, --version -o, --origin=STRING (URL) . -i, --appid=STRING (Application ID) . -c, --challenge=STRING ( Base64-URL) . -a, --action=ENUM . ( ="register" "authenticate") -k, --key-handle=STRING key-handle -p, --user-key=STRING (user-key) -d, --debug (=off) -x, --x509cert=STRING (attestation) (REPORTING BUGS) . libu2f-server 1.1.0 LIBU2F-SERVER(1)