Google enhances, simplifies two-step authentication with physical USB Security Key | TechSpot
Amazon.com: FIDO U2F Security Key, Thetis [Aluminum Folding Design] Universal Two Factor Authentication USB (Type A) for Extra Protection in Windows/Linux/Mac OS, Gmail, Facebook, Dropbox, SalesForce, GitHub : Electronics
Usb Thetis Bluetooth U2F Security Key at Rs 4500/piece in Mumbai | ID: 23308002548
FIDO U2F Security Key – Yubico
Yubikey NEO is a $50 USB & NFC Key Used to Secure your Computer and Smartphone - CNX Software