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In this tutorial, the presenter demonstrates how to create a substitution cipher encryption program. The process involves encrypting a message by randomly replacing each character with another, using a specific key for both encryption and decryption. The presenter shares their experience of submitting this program as a final assignment in a university cyber security course, where they received an A. To begin coding, they import the random and string modules and create a string of characters for the encryption. The presenter suggests using constants from the string module for convenience, including punctuation in the encryption process.
