How to Solve Real-Time Auth Without Having to Sacrifice Performance

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I will walk you through, step-by-step, how to build a fully functional, high-performance WebSocket server in Symfony that is secured by Keycloak.
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In today’s enterprise world, authentication is almost always delegated to a central, external server: an SSO provider like Keycloak. The obvious answer, token introspection, is a performance-bottleneck nightmare. We will not be making any blocking API calls. Instead, we will perform local, cryptographic validation of KeyCloak’S JWTs using their public JSON Web Key Set.