A passwordless sign-in credential based on FIDO2 and WebAuthn that uses a cryptographic key pair stored on your device instead of a password.
When you create a passkey for a website or app, your device generates a unique pair of cryptographic keys. The private key stays on your device or in a credential manager, while the public key is stored by the service. To sign in, you confirm with your fingerprint, face scan, or device PIN, and the device proves it holds the private key without ever sending it.
Passkeys resist phishing because they are tied to the genuine website's domain, so a lookalike site cannot use them. They also cannot be reused across sites, and a breach of a service's database exposes only public keys. Major platforms from Apple, Google, and Microsoft support passkeys, which can sync across a person's devices. Account recovery and moving passkeys between ecosystems are still areas of ongoing improvement.
The process of verifying that a user, device, or system is who or what it claims to be.
Multi-Factor AuthenticationA login method that requires two or more different types of proof of identity, such as a password plus a code from your phone.
Password ManagerAn app that securely stores and fills in passwords, so you can use a strong, unique password for every account without memorizing them.
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