Image Encryption

Overview

The Image Encryption project is designed to provide a simple yet effective method for encrypting and decrypting image files using pixel manipulation. This tool uses a straightforward XOR-based algorithm to ensure image data remains confidential and protected from unauthorized access. The project handles PNG format images to avoid issues related to lossy compression found in JPEGs.

Features

• Simple Encryption and Decryption: Uses an XOR-based algorithm to encrypt and decrypt image data.
• PNG Format Support: Uses PNG format to avoid compression artifacts and preserve image quality.
• Pixel Manipulation: Provides debugging information to verify pixel values during encryption and decryption.

Installation

To get started with the project, follow these steps:

1. Clone the Repository:

   git clone https://github.com/your-username/image-encryption.git

2. Navigate to the Project Directory:

   cd image-encryption

3. Install Dependencies: Ensure you have Python installed. Install the necessary packages using:

   pip install Pillow numpy

Usage

1. Run the Script:

   python Image_Encryption.py

2. Follow the Prompts:

   • Encryption:

     • Enter the path of the image you want to encrypt (preferably in PNG format).
     • Enter a key for encryption.
     • Specify the output path for the encrypted image (e.g., encrypted_image.png).

   • Decryption:

     • Enter the path of the encrypted image (e.g., encrypted_image.png).
     • Enter the key for decryption.
     • Specify the output path for the decrypted image (e.g., decrypted_image.png).
     • Optionally, provide the path to the original image to compare the decrypted image with the original.

Technical Challenges and Solutions

Pixel Range and Comparison Issue

Issue: Initial implementations had trouble with pixel range and comparison, leading to inaccuracies in the encryption and decryption process.

Solution:

• Adjusted the pixel comparison logic to handle a broader range of pixel values.
• Implemented a more precise algorithm to ensure accurate encryption and decryption.

JPG Format Limitation

Issue: JPG format caused issues due to its lossy compression, affecting pixel accuracy.

Solution:

• Switched to PNG format to preserve image quality and avoid compression artifacts.
• Updated the code to handle PNG files effectively.