Passkey

Noun · Security & Infosec

Definitions

  1. A passwordless authentication credential based on WebAuthn/FIDO2 that uses public key cryptography. The private key never leaves the user's device (or syncs via iCloud Keychain / Google Password Manager). Authentication uses biometrics or device PIN to unlock the key. Phishing-resistant because the credential is bound to the origin (domain).

    In plain English: A modern replacement for passwords that uses your device's biometrics (fingerprint, face) and can't be phished.

    Example: "Enable passkey login — users authenticate with Face ID instead of remembering a password, and it's immune to phishing because the key is domain-bound."

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