JWT (JSON Web Token)

JSON Web Token (JWT) is a compact way to securely transmit information between parties as a JSON object. It consists of three parts: a header, a payload, and a signature. The header identifies the signing algorithm, the payload carries claims or information (like user ID), and the signature ensures the token’s integrity, confirming it hasn't been altered. JWTs are commonly used for authentication, allowing users to prove their identity without needing to repeatedly send sensitive information, making it efficient for web and mobile applications. They're widely adopted due to their simplicity and security features.