FIDO U2F Security Key SECURE ONLINE ACCOUNTS - Protect your online accounts with a strong two-factor authentication, U2F. Never lose access to sensitive online accounts such as bank accounts, email accounts, and private documents through password theft, phishing, hacking or keylogging scams. This security key combats real-time attacks such as man-in-the-middle (MITM). UNIVERSAL COMPATIBILITY - The HyperFIDO U2F security key device works with the latest Google Chrome or any other FIDO-compliant browser on Windows, Mac OS or Linux. FIDO U2F CERTIFIED - Certified by Fast IDentity Online FIDO Alliance. Supports U2F protocol (No UAF or OTP). COMPACT DESIGN - Designed with a compact form factor attaches easily to a keychain without bulk. Because of its low-cost and simple design the HyperFIDO is also perfect as a second backup U2F security key. USER FRIENDLY - Authentication with the press of a button. Simple and twice as secure because only the physical act of pressing the button on the HyperFIDO security key can grant access. Use a single trusted device to sign in to multiple accounts, enables keychain devices. No PIN or password to memorize, simply plug and play!