🔐 Piero EnDe-Coder

A powerful encryption and decryption tool that combines the Vigenère cipher, XOR encryption, and Base64 encoding to secure messages. This tool allows users to encode and decode messages using a secret key, ensuring an extra layer of security.

⚙️ Features

✔ Uses Vigenère cipher for initial encryption
✔ Applies XOR encryption with a randomly generated key
✔ Encodes results in Base64 for safe storage and transmission
✔ Supports decryption with the correct key
✔ Interactive menu-based CLI

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📚 Table of Contents

• How It Works
• Installation
• Usage
• Encryption & Decryption Process
• Example Usage
• Technical Details
• License

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💡 How It Works

Piero EnDe-Coder follows a three-layered encryption process:

1. Vigenère Cipher: Encrypts the text using a key-based shifting method.
2. XOR Encryption: Applies XOR transformation with a randomly generated key.
3. Base64 Encoding: Encodes the final result into Base64 for secure transfer.

For decryption, the process is reversed:

1. Base64 Decoding → XOR Decryption → Vigenère Decryption.

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🛠️ Installation

✅ Download the file from:

https://github.com/pieroboseta/Piero-EnDe-Coder/releases/tag/Security

or

No external dependencies are required. Simply clone this repository and run the script.

git clone https://github.com/pieroboseta/Piero-EnDe-Coder.git
cd Piero-EnDe-Coder
python Piero-EnDe-Coder.py

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💖 Support This Project

If you find this project helpful, consider supporting its development! Your donation helps keep the project alive and improve it further.

Every contribution is greatly appreciated! Thank you for your support. 🙌

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👨‍💻 Usage

Running the Program

Run the script using:

python Piero-EnDe-Coder.py

You'll see a menu like this:

*****************************
      PIERO ENDE-CODER       
*****************************
Instructions:
  - This tool encrypts and decrypts messages using the Vigenère Cipher
    combined with XOR encryption.
  - You will need to enter a **secret key** for encryption and decryption.

Choose an option:
  [1] Encrypt a message
  [2] Decrypt a message
  [3] Exit
*****************************

Encrypt a Message

1. Select Option 1.
2. Enter a secret key (used for encryption and decryption).
3. Enter the text to encrypt.
4. Receive the encrypted message.

Decrypt a Message

1. Select Option 2.
2. Enter the same secret key used for encryption.
3. Enter the encrypted text.
4. Receive the decrypted message.

Exit

• Select Option 3 to exit the program.

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📌 Encryption & Decryption Process

Step	Encryption	Decryption
1	Vigenère Cipher shifts text with key	Reverse Vigenère Cipher restores text
2	XOR Encryption scrambles data with key	XOR Decryption reverses the transformation
3	Base64 Encoding makes text safe for storage	Base64 Decoding restores encrypted text

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🧩 Example Usage

Encryption Example:

Enter the secret key: secret123
Enter the text to encrypt: Hello World

Output (Encrypted Text):

UGFr... (Base64 Encoded String)

Decryption Example:

Enter the secret key: secret123
Enter the encrypted text: UGFr...

Output (Decrypted Text):

Hello World

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🧐 Technical Details

• Programming Language: Python 3
• Encryption Methods:
  • Vigenère Cipher (Key-based shift cipher)
  • XOR Cipher (Bitwise transformation)
  • Base64 Encoding (Safe text encoding)

🔎 Functions Overview:

Function	Purpose
xor_encrypt(text, key)	Applies XOR encryption to text
vigenere_cipher(text, key, encrypt=True)	Encrypts/decrypts using the Vigenère cipher
vigenere_encode(text, key)	Encrypts using Vigenère, XOR, and Base64
vigenere_decode(text, key)	Decrypts by reversing Base64, XOR, and Vigenère
print_menu()	Displays the main menu
main()	Runs the interactive command-line interface

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📝 License

This project is open-source and free to use.
Licensed under the MIT License.

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