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In this tutorial, the focus is on using the JSON Web Encryption (JWE) standard to encrypt a purchase order during web checkout. The tutorial highlights the importance of JWE, which standardizes the packaging of data encryption algorithms to ensure that the decryption process is accessible to the intended recipient. The tutorial also involves using the "dotenv" package to store environment variables in a .env file, where public and private keys will be saved. If the .env file lacks these keys, they will be created. The tutorial includes a section on generating a symmetric key pair, demonstrating key pair or secret generation through a function that requires an algorithm identifier as a parameter.