#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