In a nutshell
- Passkeys replace passwords with biometric login (fingerprint/face).
- They're stored on your device and synced securely across trusted devices.
- Safer than passwords: no phishing, no reuse risks, no weak passwords.
What is a passkey?
A passkey is a digital credential that lets you log in using your fingerprint, face, or device PIN instead of a password. It's like a secure key that only works with your approval.
Unlike passwords, passkeys are unique to each site and can't be guessed or stolen easily.
How passkeys work (simple version)
When you create a passkey:
- Your device generates a unique key pair (public and private).
- The public key goes to the website.
- The private key stays on your device, protected by biometrics.
To log in, the site challenges your device, and you approve with fingerprint/face.
Why passkeys are safer than passwords
- No phishing: Passkeys only work on the real site, not fake ones.
- No reuse issues: Each site gets its own unique key.
- Strong by default: No weak passwords or forgotten resets.
- Hardware-backed: Uses secure chips in your phone/computer.
How to set up passkeys
Most modern browsers and devices support passkeys:
- On iPhone/iPad: Settings > Passwords > AutoFill Passwords.
- On Android: Settings > Google > Manage your Google Account > Security > Passkeys.
- On Windows/Mac: In browser settings (Chrome, Edge, Safari).
Look for "Create a passkey" or "Use passkey" during login.
Tip: Start with one site like Google or GitHub to get comfortable.
Passkey limitations
Passkeys aren't perfect:
- Not all sites support them yet.
- If you lose all devices, recovery can be tricky (use backup codes).
- Requires biometric hardware (most phones have it).
Passkeys vs other methods
Compared to SMS codes: Passkeys are faster and phishing-proof.
Compared to authenticator apps: Passkeys are built-in, no extra app needed.