I recently upgraded my YubiKeys with the purchase of two 5C NFC devices. I worked through all the ways I use YubiKey and as I was updating my Twitter security settings I noticed something new. Twitter now supports multiple 2FA security keys and is one of the first sites I’ve run across to do so. It was great news for me as I was setting up my new 5C YubiKeys in tandem. One I would keep close by if not on me at all times and another to go in a safe. Both configured the same.

I was able to get my YubiKey Edge working with GitHub Two-factor Authentication recently. On github.com I went through the two-factor setup and selected the authentication app option. When I got to the screen with the QR code I launched the YubiKey Authenticator app on Mac OS X Yosemite (10.10.x) and plugged in my YubiKey Edge. I then chose the File -> Add option in the menubar. I actually had to click back and forth between the YubiKey Authenticator icon in the Dock and any other app icon in…

About a week ago I purchased a YubiKey Edge, a USB security device from Yubico. The company makes several editions of the YubiKey each designed to add security to your interactions on the Internet. The most common use case of the device is functioning as a hardware component in two-factor authentication. Yubico calls this 2FA while others, such as Google, refer to it as 2-step verification. In either case the point is for the end user to supply something they know in conjunction with something…