What is WebAuthn?
WebAuthn (Web Authentication) is a web standard that lets you log into websites using a fingerprint, face scan, security key, or other device instead of a password. It works directly in your browser and makes the login process more secure and easier.
Let's break it down
- Web: the internet, the places you visit in a browser.
- Authentication: proving who you are, like showing an ID.
- Standard: a set of rules that many companies agree to follow.
- Fingerprint, face scan, security key: physical things that can prove it’s really you.
- Browser: the program (Chrome, Firefox, etc.) you use to view websites.
Why does it matter?
Passwords are easy to forget, reuse, or get stolen. WebAuthn replaces them with something you have (a device) or something you are (biometrics), which greatly reduces the risk of hacks and makes logging in faster for everyday users.
Where is it used?
- Online banking apps that let you log in with a fingerprint on your phone.
- Corporate single sign-on systems that accept a USB security key instead of a password.
- Popular services like Google, Microsoft, and GitHub offering “login with security key” options.
- E-commerce sites that provide a one-tap login using your device’s built-in biometric sensor.
Good things about it
- Stronger security: attackers can’t guess or steal a password.
- Phishing resistance: the authentication is tied to the actual website, not a fake link.
- Convenience: no need to remember or type complex passwords.
- Compatibility: works across many browsers and operating systems.
- Future-proof: designed to support new authenticators as technology evolves.
Not-so-good things
- Requires compatible hardware (fingerprint sensor, security key, etc.), which not everyone has.
- Initial setup can be confusing for non-technical users.
- Some older browsers or devices don’t support the standard yet.
- If you lose your authenticator device and haven’t set up a backup, you may be locked out.