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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 first step is to utilize the npm package for JSON Object Signing and Encryption (JOSE), which provides a standard method for packaging encrypted data. It ensures that the program decrypting the data knows the algorithm used for encryption. Additionally, the tutorial incorporates the 'dotenv' package to manage environment variables, such as public and private keys, in a .env file. If the .env file does not contain these keys, they will be created. The tutorial demonstrates symmetric key pair generation using a function to generate the key pair based on an algorithm identifier.