Enables U2F PAM (pam-u2f) module. If set, users listed in $XDG_CONFIG_HOME/Yubico/u2f_keys (or $HOME/.config/Yubico/u2f_keys if XDG variable is not set) are able to log in with the associated U2F key. The path can be changed using security.pam.u2f.authFile option. File format is: <username1>:<KeyHandle1>,<UserKey1>,<CoseType1>,<Options1>:<KeyHandle2>,<UserKey2>,<CoseType2>,<Options2>:... <username2>:<KeyHandle1>,<UserKey1>,<CoseType1>,<Options1>:<KeyHandle2>,<UserKey2>,<CoseType2>,<Options2>:... This file can be generated using pamu2fcfg command. More information can be found here.

false