Building a 100% Passwordless Future: Passkeys in Symfony 7.4

In the modern web era, passwords are no longer sufficient. They are the root cause of over 80% of data breaches, subject to phishing, reuse and terrible complexity rules. The industry has spoken: Passkeys are the future . Passkeys, built on the Web Authentication ( WebAuthn ) and FIDO2 standards, replace traditional passwords with cryptographic key pairs. Your device (iPhone, Android, Windows Hello, YubiKey) stores a private key, while the server only ever sees the public key. No hashes to steal, no passwords to reset and inherently phishing-resistant. In this comprehensive guide, we will build a 100% passwordless authentication system using Symfony and the official web-auth/webauthn-symfony-bundle . We will eliminate the concept of a password entirely from our application. No fallback, no “reset password” links. Just pure, secure, biometric-backed passkeys. Core Architecture & Requirements Passkeys work by replacing a shared secret (password) with a public/private key pair. The privat