What are the differences between JWT and session authentication?

What are the differences between JWT and session authentication?

JWT (JSON Web Tokens) and session authentication are both methods for managing user authentication, but they differ significantly. JWT is stateless and allows for decentralized authentication, while session authentication is stateful and relies on server-side storage.

Can you explain how JWT works in more detail?

Sure! JWT works by encoding user information into a token that is signed and can be verified. When a user logs in, the server generates a JWT and sends it back to the client, which stores it. The client then includes this token in the header of subsequent requests to authenticate.

What are the advantages of using JWT over session authentication?

Some advantages of JWT include scalability, as they can be used across different domains, and reduced server load since they don't require session storage. They also allow for easier implementation of single sign-on (SSO) solutions.

Are there any security concerns with using JWT?

Yes, there are security concerns with JWT, such as token expiration, secure storage, and the risk of token theft. It's important to implement best practices like using HTTPS and setting short expiration times.