What Is Passkeys?
Passkeys (WebAuthn)
Passkeys are a passwordless authentication method built on WebAuthn/FIDO2 standards. Instead of passwords, you authenticate with biometrics (fingerprint, face) or device PIN. Passkeys are phishing-resistant, can't be stolen in data breaches, and are synced across devices via iCloud/Google.
How Passkeys Works
Login with a passkey: click 'Sign in' → device prompts for fingerprint/face/PIN → cryptographic challenge-response proves your identity → you're logged in. No password to remember, type, or steal. Apple, Google, and Microsoft all support passkeys.
Key Concepts
- Phishing-Resistant — Passkeys are bound to the website's domain — they can't be used on phishing sites
- Public-Key Cryptography — The server stores only the public key — database breaches don't expose credentials
- Cross-Device Sync — Passkeys sync via iCloud Keychain, Google Password Manager, or 1Password
Frequently Asked Questions
Are passkeys replacing passwords?
Yes, gradually. Apple, Google, Microsoft, GitHub, and many others support passkeys. Passwords won't disappear overnight, but passkeys are the future of authentication.