🔐 File Encryptor & Decryptor (C#)

A simple and fast console tool to encrypt and decrypt any kind of file using XOR byte encryption. Perfect for basic obfuscation or fun file-locking projects. Works on Windows and Linux.

---

✨ Features

• 🔒 Encrypts any file type (ZIP, PDF, EXE, TXT, JPG, etc.)
• 🔁 Reversible XOR cipher encryption
• ✅ Input validation for file path and key
• 📂 Saves output as .encrypted or .decrypted
• 🧠 One key does both encryption & decryption
• 💻 Runs on Windows and Linux

---

⚙️ How It Works

This tool uses a symmetric XOR algorithm:

• XORs each byte of the file with a numeric key (0–255)
• XORing the same file twice with the same key restores the original

Operation	Input File	Output File
Encrypt	example.zip	example.zip.encrypted
Decrypt	example.zip.encrypted	example.zip.encrypted.decrypted

---

💻 How to Run

🪟 Windows

1. Make sure .NET SDK is installed.
2. Open CMD or PowerShell in the folder containing the .cs file.
3. Build and run:

dotnet new console -o FileEncryptorApp
cd FileEncryptorApp
# Replace default Program.cs
copy ..\Program.cs .\Program.cs
dotnet build
After building, run the .exe directly:

cd bin\Debug\net8.0
File\ Encryptor\ \&\ Decrypter.exe
💡 Tip: You can also double-click the File Encryptor & Decrypter.exe in File Explorer.


🐧 Linux
Install .NET SDK:

sudo apt update
sudo apt install dotnet-sdk-8.0
In terminal:

dotnet new console -o FileEncryptorApp
cd FileEncryptorApp
mv ../Program.cs ./Program.cs
dotnet run
Or, build and run the output manually:

dotnet build
cd bin/Debug/net8.0
./File\ Encryptor\ \&\ Decrypter
🧪 Example Usage

Enter file path: /home/user/Desktop/test.pdf
Enter encryption key (0–255): 123
✅ File encrypted successfully: test.pdf.encrypted
To decrypt, run again with the .encrypted file and the same key.

⚠️ Disclaimer
This tool uses basic XOR encryption, which is not secure for highly sensitive data. It’s intended for educational purposes, light protection, or pranking.

📄 License
Open-source under the MIT License.

👤 Author
Made by @dionabazi with ❤️

## ☕ Support Me
If you like this project, feel free to [buy me a coffee](https://ko-fi.com/G2G114SBVV)!

[![Buy Me a Coffee](https://ko-fi.com/img/githubbutton_sm.svg)](https://ko-fi.com/G2G114SBVV)