JSON Web Token (JWT) is an open standard (RFC 7519) that defines a compact and self-contained way for securely transmitting information between parties as a JSON object.

How it Works

• Header: Contains metadata about the token, such as the algorithm used for signing.
• Payload: Contains the actual data (claims) being transmitted.
• Signature: A cryptographic hash of the header and payload, used to verify the token's integrity.

Security Best Practices

Never include sensitive information like passwords in the JWT payload, as it can be easily decoded by anyone who has the token. Always verify the signature on the server-side before trusting the data.