Implementing WebAuthn for passwordless logins

WebAuthn, or Web Authentication API, offers a passwordless authentication solution using public key cryptography to enhance security and simplify login processes across devices and operating systems. Published by the World Wide Web Consortium (W3C) in collaboration with the Fast Identity Online (FIDO) Alliance, it involves three key components: the relying party (the service requesting authentication), the WebAuthn client (integrated in browsers or apps), and the authenticator (such as a fingerprint scanner or security key). The implementation requires setting up a web app with specific prerequisites, including Node.js and a MongoDB database, to manage user credentials. The setup process involves creating registration and login forms, handling API endpoints, and integrating the authentication flow with user-friendly interfaces. While WebAuthn offers significant security advantages by reducing reliance on passwords and supporting multi-factor authentication, it presents challenges in integration, especially for organizations with complex systems, and may require user education to overcome unfamiliarity with the technology.