What is JWT and how does it enhance authorization security?

What is JWT and how does it enhance authorization security?

JWT, or JSON Web Token, is a compact, URL-safe means of representing claims to be transferred between two parties. It enhances authorization security by allowing the server to verify the token's authenticity without needing to store session information.

Can you explain how JWT works in a web application?

Sure! In a web application, when a user logs in, the server generates a JWT containing user information and signs it with a secret key. This token is then sent to the client, which stores it (usually in local storage). For subsequent requests, the client sends the JWT in the Authorization header, allowing the server to verify the user's identity.

What are the advantages of using JWT over traditional session-based authentication?

JWTs are stateless, meaning they don't require server-side storage, which can improve scalability. They also allow for cross-domain authentication and can carry more information, making them versatile for various applications.

Are there any security concerns I should be aware of when using JWT?

Yes, some concerns include token expiration, secure storage of the token, and ensuring the secret key used for signing is kept safe. It's also important to validate the token on every request to prevent unauthorized access.