Encryption and Decryption Tool

This is a simple Python-based command-line tool for generating encryption keys, encrypting messages, and decrypting them using the cryptography library's Fernet module.

Features

• Generate Key: Create a secure encryption key.
• Encrypt Message: Securely encrypt any text message.
• Decrypt Message: Decrypt an encrypted message back to its original form using the corresponding key.

Prerequisites

• Python 3.x must be installed on your system.
• Install the required libraries using the requirements.txt file:

pip install -r requirements.txt

Usage

1. Clone the Repository:

   git clone https://github.com/deveshpujnabi/encryption-and-decryption.git
   cd encryption-decryption-tool

2. Install Dependencies:

   pip install -r requirements.txt

3. Run the Program:

   python encryption_decryption.py

4. Menu Options:

   • 1. Generate a new key: Generates a new encryption key and displays it.

   • 2. Encrypt a message: Prompts for a message and encrypts it using the provided key.

   • 3. Decrypt a message: Prompts for an encrypted message and decrypts it using the provided key.

   • 4. Exit: Exits the program.

Folder Structure

Your project should be organized as follows:

encryption-decryption-tool/
│
├── encryption_decryption.py   # Your main Python script
├── README.md                  # The README file for your project
├── requirements.txt           # Dependencies for the project
└── LICENSE                    # License file (optional)

• encryption_decryption.py: Your main Python script containing the encryption and decryption code.
• README.md: Provides an overview of the project and instructions for use.
• requirements.txt: Lists the Python packages required for the project.
• LICENSE: (Optional) A file specifying the license under which your project is distributed.

Example

Menu:
1. Generate a new key
2. Encrypt a message
3. Decrypt a message
4. Exit

Enter your choice (1-4): 1
Generated key: AbCdeFgHiJkLmNoPqRsTuVwXyZ1234567890=

Code Explanation

• generate_key(): Generates a new Fernet key for encryption and decryption.
• encrypt_message(message, key): Encrypts a given message using the provided key.
• decrypt_message(encrypted_message, key): Decrypts an encrypted message using the corresponding key.
• main(): Handles the user interaction and menu options.

Important Notes

• Security: The encryption key is displayed in plain text for demonstration purposes. In real-world applications, ensure that keys are securely stored.
• Key Management: Losing the encryption key means that you will not be able to decrypt the encrypted messages.

License

This project is licensed under the MIT License. See the LICENSE file for more details.

Acknowledgements

• This tool uses the cryptography library for secure encryption and decryption.

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This README.md provides clear guidance on the project’s structure, dependencies, and usage, ensuring that anyone can set it up and run it easily.