JWT

12 videos across 9 channels

JSON Web Tokens are a lightweight, server-verified way to prove identity and grant access without storing session state. The core idea is a base64-encoded header and payload secured by a signature that ensures integrity, so sensitive data shouldn’t live in the payload and secrets must be kept server-side. In practical apps, like the Next.js/postgres project, JWTs enable authentication and user-scoped access, while also highlighting common pitfalls and the need for careful handling of tokens across the UI and server actions.