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🔐 Encrypt Decrypt Tool

A versatile and secure command-line utility for encrypting and decrypting files of various formats using the Fernet symmetric encryption algorithm.

✨ Key Features

  • 🔒 Strong Encryption & Decryption
    Securely encrypt and decrypt any file with the powerful Fernet encryption algorithm.

  • 📂 Multi-format Support
    Works with a wide range of file types — including .mp3, .jpeg, .png, .txt, and more.

  • 🛠 Command-Line Interface
    Simple, script-friendly CLI design for quick use and seamless automation in your workflows.

  • 📁 Flexible I/O Options
    Easily specify input and output paths to maintain full control over where your files go.

⚙️ How It Works

This tool uses Fernet encryption provided by the cryptography Python package. Fernet guarantees that a message encrypted using it cannot be manipulated or read without the key.

🚀 Getting Started

🔧 Prerequisites

Make sure you have Python installed. Then, install the required package:

pip install cryptography

🧑‍💻 Usage

🔐 Encrypt a file

python encrypt_decrypt_tool.py encrypt input_file [--output_file OUTPUT_FILE]

🔓 Decrypt a file

python encrypt_decrypt_tool.py decrypt input_file [--output_file OUTPUT_FILE]

📌 Example

python encrypt_decrypt_tool.py encrypt secret.txt --output_file secret.encrypted
python encrypt_decrypt_tool.py decrypt secret.encrypted --output_file secret_decrypted.txt

📽 Preview

Preview.mp4

📁 Supported File Formats

  • Text files (.txt)
  • Audio files (.mp3)
  • Image files (.jpeg, .png)
  • And virtually any other file type

🔐 Why Fernet?

Fernet is part of the Python cryptography library and ensures:

  • Secure symmetric encryption (AES in CBC mode with a SHA256 HMAC)
  • Time-based token validity (optional)
  • Easy key management and sharing

📄 License

This project is licensed under the MIT License.

Built with ❤️ using Python and cryptography.