Why Developers Should Care

Security and product wins

  • No shared secret to steal from your database.
  • Private keys stay on the authenticator.
  • Login is bound to the site identity, not just a UI that looks convincing.
  • Users approve with Face ID, Touch ID, Windows Hello, or a hardware key.

What changes in your app

  • The browser becomes part of the auth protocol.
  • Your server sends challenges and verifies signed responses.
  • Your domain setup matters because the RP ID is part of identity.
  • Recovery and fallback flows still matter for production.
Intro to Passkeys
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