Alright boys and girls, you can now turn your Android phone into a YubiKey. From a machine on systems net, go to https://yubiauth.mcs.anl.gov/YubiApp. At the bottom of the login box is a link to the .apk to install (https://yubiauth.mcs.anl.gov/YubiApp/YubiApp/Android/YubiApp-Android.apk). Next login with <username>@mcs.anl.gov your MCS password and then push Yubi password. That will generate a soft key. Open the YubiApp on your phone, scan the QR code and then click the "Continue to Upload AES key" button.