File Encryption Program

A simple C program to encrypt and decrypt files using XOR encryption. The program allows users to select a file by entering its full path and provides options to encrypt or decrypt the file using a custom password (key).

Features

✅ Encrypts any file using a user-defined key ✅ Decrypts the file with the same key ✅ Works with full file paths ✅ Supports Windows file paths with quotes ("C:\\path\\to\\file.txt") ✅ No external libraries required

How It Works

The program applies XOR encryption, meaning:

• Encryption and decryption use the same function.
• If you encrypt a file twice with the same key, you get the original file back.

Installation & Compilation

Linux & macOS

gcc -o file_encryption main.c

Windows (MinGW)

gcc -o file_encryption.exe main.c

Usage

Run the program from the command line:

./file_encryption

Encrypt a File

1
"C:\Users\YourName\Desktop\secret.txt"
MySecretKey

Output: C:\Users\YourName\Desktop\secret.txt.enc

Decrypt a File

2
"C:\Users\YourName\Desktop\secret.txt.enc"
MySecretKey

Output: C:\Users\YourName\Desktop\secret.txt.enc.dec

Notes

• The same key must be used for encryption and decryption.
• If the key is lost, decryption is impossible.
• The program does not store the key for security reasons.

License

This project is licensed under the MIT License - see the LICENSE file for details.

Contributing

Feel free to submit pull requests or report issues in the GitHub repository!