JSON Web Tokens (JWT) are a powerful tool used in web development for securely transmitting information between different systems. They are especially useful for authentication and ensuring safe data exchange. In this blog, we’ll break down what JWTs are, how they work, and how you can use Auth0 to easily integrate JWT into your applications. What is JSON Web Token (JWT)? JWT is an open standard (RFC 7519) that provides a compact, self-contained way of securely transmitting information between parties as a JSON object. This token can be digitally signed and verified, ensuring its integrity. You can sign a JWT using a shared secret with the HMAC algorithm or a public/private key pair with RSA or ECDSA. While JWTs can also be encrypted to ensure privacy, this guide will focus on signed JWTs to verify the authenticity of the claims they contain. Key Scenarios for JWT Usage Authorization: The most common use case for JWT. Once a user logs in, the server generates a JWT that is included w...