![]() Second, the browser sends the code directly to the website, so an attacker sitting in between can’t capture the temporary two-factor code and enter it on the real website to gain access to your account. ![]() First, the browser checks to ensure it’s communicating with the real website using encryption, so users won’t be tricked into entering their two-factor codes into fake phishing websites. When you insert it into your computer’s USB port or tap it against your phone, the browser on your computer can communicate with the USB security key using secure encryption technology and provide the correct response that lets you log into a website.īecause this runs as part of the browser itself, this gives you some nice security improvements over typical two-factor authentication. It’s based on existing “smart card” security technology. A U2F token like the Yubikey instead performs an authentication handshake with a website that not only proves to a website that it's your unique key, but requires that the website prove its. We take the security of this project seriously. ![]() This tool works with Google Chrome/Chromium, Safari, Firefox and Operas built-in U2F implementations. It emulates a hardware U2F HID device and performs cryptographic operations using the macOS Keychain. Some of them have NFC support so they can be used with Android phones. Soft U2F is a software U2F authenticator for macOS. Currently, U2F devices are usually small USB devices that you insert in your computer’s USB port.
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