Yubikey

Links

• Download the tool
• Setup of a self-hosted Yubico OTP validation server
• Yubikey PHP Library
• How To Configure Your Yubikey for Maximum Usefulness & Security
• Using the Yubikey for two-factor authentication on Linux
• https://github.com/cgkades/yubiserver/blob/master/README
• PGP and SSH keys on a Yubikey NEO
• https://gist.github.com/ageis/14adc308087859e199912b4c79c4aaa4 YubiKey 4 series GPG and SSH setup guide]

FAQ

Failled connecting to the Yubikey. Make sure the application has the required permissions

yubikey-manager-qt -> OTP install libyubikey-udev or

https://support.yubico.com/hc/en-us/articles/360016648939-Troubleshooting-Failed-connecting-to-the-YubiKey-Make-sure-the-application-has-the-required-permissions-in-YubiKey-Manager