What Is a Passkey?
Passkeys are a modern, passwordless authentication method designed to enhance security and user convenience. Instead of relying on traditional passwords, passkeys utilize cryptographic key pairs to verify identity.
A passkey consists of two components: a public key stored on the service's server and a private key stored securely on your device. When you attempt to log in, the service sends a challenge that your device signs using the private key. This signed response is then verified with the public key, granting access without transmitting sensitive information.
How It Works
Registration: When setting up a passkey, your device generates a unique key pair. The public key is shared with the service, while the private key remains on your device.
Authentication: To log in, you authenticate using a method like fingerprint, facial recognition, or a PIN. Your device uses the private key to sign a challenge from the service, which is then verified using the public key.
Benefits of Passkeys
Enhanced Security: Passkeys are resistant to phishing attacks since there's no password to steal.
Convenience: No need to wait for one time password; authentication is quick and seamless.
Cross-Device Compatibility: Passkeys can sync across devices within the same ecosystem, allowing for flexible access.
Major tech companies like Apple, Google, and Microsoft are adopting passkeys, signaling a shift towards a more secure, passwordless future.