PRODIGY_CS_02

Image Encryption and Decryption using Pixel Manipulation

📌 Overview

This Python program encrypts and decrypts images using pixel manipulation and XOR operation. It generates a unique encryption key for each image and ensures secure decryption using the same key.

🚀 Features

• Encrypt images by modifying pixel values.
• Generate and store an encryption key for later use.
• Decrypt encrypted images using the saved key.
• Ensures secure encryption using XOR-based pixel transformation.
• Handles errors for missing files and incorrect inputs.

🛠 Requirements

• Python 3.x
• Pillow (pip install pillow)
• NumPy (pip install numpy)

📌 How It Works

1. Encryption:

   • Loads an image.
   • Generates a random encryption key and stores it (encryption_key.npy).
   • Applies XOR operation to pixel values.
   • Saves the encrypted image as encrypted_image.png.

2. Decryption:

   • Loads the encrypted image and stored key.
   • Applies XOR operation again to restore the original image.
   • Saves the decrypted image as decrypted_image.png.

📜 Usage

1. Run the script:

   python image_encryption.py

2. Enter the path to your image when prompted.
3. The program will automatically encrypt and decrypt the image.

📂 Output Files

• encrypted_image.png (Encrypted version of the image)
• decrypted_image.png (Decrypted image, identical to the original)
• encryption_key.npy (Stored encryption key for decryption)

⚠️ Important Notes

• The same key is required for decryption. If the key file is lost, decryption will not work.
• The encryption is not meant for high-security applications but serves as an educational tool.

📧 Contact

For any questions or improvements, feel free to reach out!

Happy Coding! 🚀