"The coolest authentication hardware device ever." -- Steve Gibson, Security Now!
Here are some excerpts from the Security Now! postcast discussing the Yubikey authentication hardware device Steve Gibson is referring to in his quote above.
Yubikey is an OpenID tool (one option is to use Yubico as your OpenID provider). Yubikey is also much, much more, as you will find out if you listen to the podcast.
Using Yubikey as an OpenID authenication tool, any time you needed to authenticate to an OpenID site you would just reach down and put your finger on the little touch surface of the YubiKey, and it would emit a one-time token.
YubiKey has a number of other features. One is an anti-phishing feature. The authenticator is able to determine when the YubiKey's output was generated.