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    .vscode
    EncryptDecrypt.cpp
    EncryptDecrypt.h
    Help.cpp
    Help.h
    README.md
    file.txt
    main.cpp
    README.md

    #EncryptDecrypt Tool

    This tool lets you both encrypt and decrypt files using three different ciphers:

    • Caesar Cipher
    • XOR Cipher
    • Vigenere Cipher

    You run this tool in the terminal, choose which cipher you want, the program will ask you for a file and a key that you wish to use.

    Compiling

    Open the terminal and type:

    g++ main.cpp EncryptDecrypt.cpp Help.cpp -o EncryptDecrypt

    This create a file called EncryptDecryptTool that you can run.

    Running the tool

    In the terminal, use this format to run the tool

    ./EncryptDecrypt [encrypt/decrypt][cipher][filename][key]

    Ciphers supported:

    • caesar — requires a number key (e.g. 3)
    • xor — requires a single character key (e.g. X)
    • vigenere — requires a word or string key (e.g. Secret)

    Examples

    Caesar encryption with the shift 16

    ./EncryptDecrypt encrypt caesar file.txt 16

    XOR decryption with key X

    ./EncryptDecrypt decrypt XOR file.txt X

    Vigenere encryption with the key SecretKey1234

    ./EncryptDecrypt encrypt vigenere file.txt SecretKey1234