Image_crypto

🔐 Secure Image Encrypter/Decrypter using SHA-256 and AES in Python

This project is a Python-based CLI tool that securely encrypts and decrypts image files using a password-derived key via SHA-256 hashing and AES symmetric encryption. It ensures data confidentiality and optional integrity verification.

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📦 Features

• 🔑 Password-based encryption: SHA-256 derived symmetric key.
• 🛡️ AES encryption/decryption (AES-256 CBC mode).
• 🔍 Integrity verification: Optional SHA-256 hash check.
• 💻 Command-line interface: Easy and interactive usage.
• 🧠 Educational: Learn about hashing + encryption in one project.
• 📁 Any image format supported: Works on raw bytes.

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🛠️ Setup

1. Clone the repository

git clone https://github.com/UTSAVS26/PyVerse.git cd PyVerse/Cybersecurity_Tools/Image_crypto

2. Create a virtual environment (recommended)

python -m venv venv
source venv/bin/activate    # On Windows: venv\Scripts\activate

3. Install dependencies

pip install pycryptodomex

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🚀 Usage

Run the tool using:

python image_crypto.py

🔐 Encryption

Choose mode (encrypt/decrypt): encrypt
Enter image path: secret.png
Enter password: myStrongPassword123

Result: Encrypted file saved as secret.png.enc.

🔓 Decryption

Choose mode (encrypt/decrypt): decrypt
Enter encrypted file path: secret.png.enc
Enter password: myStrongPassword123

Result: Decrypted image saved as secret.png.dec.png.

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🧪 Example

Original Hash   : 3a1f0b...
Decrypted Hash  : 3a1f0b... (Match ✅)

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📌 Notes

• The encrypted file includes the IV (initialization vector) prepended to the ciphertext.
• Passwords are not stored anywhere — use strong ones you can remember.
• Works for any file but optimized for images.

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👨‍💻 Author

Made by @SK8-infi