What are passkeys and how do they work?

Passkeys provide a highly secure and convenient way to sign into services by using public-key cryptography. Instead of traditional passwords, passkeys use a pair of cryptographic keys: a public key stored in the service and a private key stored on the user's device. This method eliminates common security issues like password reuse and phishing by ensuring each service has a unique set of keys. Additionally, passkeys integrate multifactor authentication by default, often leveraging biometric data for an extra layer of security.