JWT Authentication in a MERN Application

JSON Web Tokens provide a secure way to handle authentication in web applications. They allow the server to verify user identity without storing session data. When a user logs in, the server generates a token and sends it to the client. This token is included in future requests to access protected routes. Middleware is used to verify tokens before granting access. If the token is invalid, the request is rejected. Security is an important consideration. Tokens should be stored securely, and HTTPS should be used to prevent interception. For example, a dashboard route can be protected using JWT middleware to ensure only authenticated users can access it. In conclusion, JWT is a scalable and secure authentication method when implemented correctly.