WebAuthn is a robust, passwordless authentication API built into all major browsers, based on the W3C/FIDO2 specification. It leverages public-key cryptography to enhance security and improve user experience through methods like fingerprint sensors and facial recognition. Passkeys, a software-based implementation of WebAuthn, can sync across devices from providers like Apple, Google, and Microsoft. Implementing WebAuthn is relatively straightforward with the help of libraries like SimpleWebAuthn. Despite its many benefits, considerations include user adoption, device compatibility, account recovery, privacy concerns, and implementation complexity.
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