What are the differences between JWT and custom tokens?

What are the differences between JWT and custom tokens?

JWT, or JSON Web Tokens, are a standardized way to securely transmit information between parties. Custom tokens, on the other hand, are user-defined tokens that can vary in structure and purpose.

Can you explain how JWT works?

Sure! JWT consists of three parts: a header, a payload, and a signature. The header typically contains the type of token and the signing algorithm. The payload contains the claims, which are the statements about an entity and additional data. The signature is used to verify that the sender of the JWT is who it says it is.

What are the advantages of using JWT over custom tokens?

JWTs are widely adopted and have built-in support for claims, expiration, and signature verification, making them more secure and interoperable compared to custom tokens.

Are there any downsides to using JWT?

Yes, JWTs can become large due to the payload size, and if not managed properly, they can lead to security vulnerabilities if the signing key is compromised.