How it works
The YubiKey has 2 “slots” for credentials. By default, we program slot 1 with a YubiCloud credential. The YubiKey personalization tools allow you to add a new credential to the second slot, or even overwrite the credential in slot 1.If you have 50 or more YubiKeys, the Windows only Multi-device programming tool is an excellent free solution. For large volumes of 50,000 or more, the YubiKey programming station is ideal – with a throughput of up to 10,000 YubiKeys per hour.