Substitution Cipher Encryption (Please use Mac terminal and Python to complete.

Substitution Encryption Lab High-level idea Create a text file to be encrypted. Create encryption keys. Do encryption by applying substitution encryption algorithm using the generated key on the text file you created. Display the ciphertext Implementation and required software Command line implementation in Ubuntu. You can use Python to generate the key, Implementation details Create a text file with its content of your own choice with arbitrary length (It can contain a single word, a sentence, on even a paragraph). [You can use touch, gedit, and cat commands in the terminal.] Create a substitution key using python in the terminal. [You can use the random library, and the sample method in this library) Encrypt the text file using the keys generated. [You can use the tr terminal command.) Submit your work in .doc or .pdf format. Make sure your work encompasses the screen shots of your code, as well as, comprehensive explanations