What is JWT?
JSON Web Token (JWT) is a compact, URL-safe way of representing claims between two parties. It's widely used in authentication processes, securing API calls, and transmitting information between client and server with enhanced security. JWT consists of three parts: a header, a payload, and a signature, all encoded in Base64 format. Its popularity stems from its stateless nature, making it ideal for modern web applications that require scalability and reliability.
How JWT Works?
JWT works by encoding a set of claims into a token that can be securely passed between the client and server. When a user logs in, a JWT is generated and sent to the client. The client then includes this token in the header of every subsequent request to the server. The server decodes the token to verify the user’s identity and permissions without needing to store session data. This stateless authentication process not only reduces server load but also increases security. The token's header specifies the algorithm used, the payload contains the claims, and the signature ensures that the data hasn't been tampered with.
Source: FusionAuth
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