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Advanced Encryption and Decryption Tool

A Python-based tool for securely encrypting and decrypting data using AES-256 encryption. This tool supports encryption and decryption of both text and files, providing strong security for sensitive information. The tool allows the user to choose between AES encryption with a custom key or automatic key generation, making it suitable for various use cases.

Features

• AES-256 Encryption: Strong AES-256 encryption to protect your data.
• Support for Text and File Encryption/Decryption: Encrypt and decrypt both text and files.
• Custom Key or Auto-Generated Key: Allows users to provide a custom encryption key or automatically generate a random key.
• Base64 Encoding: Encodes encrypted data and initialization vectors in Base64 format for easy sharing and storage.
• Password-based Key Generation: Derives the encryption key from a password for secure key management.
• File Handling: Supports encrypting and decrypting entire files, making it ideal for secure file storage or transmission.
• Secure Initialization Vector (IV): Uses a random IV for each encryption, enhancing security.

Requirements

• Python 3.x
• PyCryptodome Library (for AES encryption)

Installation

Step 1: Install Python 3.x

Ensure Python 3.x is installed on your system. You can download it from python.org.

Step 2: Install Dependencies

To install the required cryptography library PyCryptodome, run the following command:

pip install pycryptodome

Usage

1. Clone this repository: Clone the repository to your local machine:

   git clone https://github.com/ParthXD7/Advanced-Encryption-Decryption-Tool.git
   cd Advanced-Encryption-Decryption-Tool

2. Run the Tool: After downloading the repository, you can run the tool with the following Python script:

   python encryption_tool.py

3. Basic Usage: The tool allows users to encrypt/decrypt messages or files. It supports encryption and decryption through a simple command-line interface.

Example Use Cases

Encrypting a Message:

Enter the text to encrypt: Hello World!
Enter a 32-byte encryption key (leave blank for auto-generation): 
Generated key: d4f44fa7b5278b3f56a35088a03abf06e742e38ff8b2876da2905f321b8b3b7f

Encrypted text: 3fcf3c02a8e640aa71763194401b8e29

Decrypting a Message:

Enter the encrypted text: 3fcf3c02a8e640aa71763194401b8e29
Enter the 32-byte encryption key: d4f44fa7b5278b3f56a35088a03abf06e742e38ff8b2876da2905f321b8b3b7f
Decrypted text: Hello World!

Encrypting/Decrypting a File:

The tool also supports file encryption and decryption, which is especially useful for securely storing or transmitting files.

Encrypt a File:

python encryption_tool.py --encrypt --file "path_to_file.txt"

Decrypt a File:

python encryption_tool.py --decrypt --file "path_to_encrypted_file.txt"

How it Works

1. AES-256 Encryption: The tool uses the AES algorithm with a 256-bit key for strong encryption. AES is one of the most widely used encryption algorithms and is considered highly secure for encrypting sensitive data.

2. Key Generation: If a key is not provided, the tool generates a random 32-byte key and uses it for encryption. Alternatively, you can provide a custom key.

3. Base64 Encoding: The encrypted text is encoded in Base64 to make it human-readable and easy to transmit or store. The initialization vector (IV) used for encryption is also encoded in Base64.

4. File Encryption: The tool can also encrypt and decrypt entire files, ensuring the confidentiality of stored data.

Code Structure

• encrypt(): This function takes plaintext and the encryption key, and returns the encrypted data.
• decrypt(): This function takes the encrypted data and the key, and returns the original plaintext.
• generate_key(): This function generates a random 32-byte key if no key is provided by the user.
• file_operations(): This function handles file encryption and decryption, allowing users to process large files.
• main(): The main function interacts with the user, handling input and executing the appropriate encryption or decryption process.

Command-Line Arguments

• --encrypt: Encrypt the provided text or file.
• --decrypt: Decrypt the provided encrypted text or file.
• --file: Specify the file to encrypt or decrypt.
• --key: Provide a custom 32-byte encryption key (optional, if not provided, a random key will be generated).
• --password: Use a password to derive the encryption key (optional).

Contributing

1. Fork the repository
2. Create a new branch (git checkout -b feature-name)
3. Commit your changes (git commit -m 'Add some feature')
4. Push to the branch (git push origin feature-name)
5. Create a new Pull Request

License

This project is open-source and available under the MIT License.

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