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JSON Web Token (JWT) is an open standard (RFC 7519) that defines a way for securely transferring information between two parties. JWT defines the structure of information we are sending from one party to another, and it comes in two forms — Serialized, Deserialized. The Serialized approach is used to transfer the data through the network with each request and response and the deserialized approach to read and write data to the web token. As this information is digitally signed, it can be verified and trusted. An unexpired JWT can become a security risk.