Secure Messaging Application

Folder Contents

1. server.py - Script to run the messaging server.
2. client.py - Script for the client to send encrypted messages to the server.
3. validation.py - Script to validate and decrypt stored messages for verification purposes.
4. config.json - Configuration file with server and encryption settings.

Prerequisites

• Python 3.x

• Required Python packages: pycryptodome (for cryptographic operations)

  To install dependencies, run:

  pip install pycryptodome
  

Configuration

Ensure the config.json file is correctly set with the following fields:

• "SERVER_HOST" - IP address of the server (e.g., "127.0.0.1").
• "SERVER_PORT" - Port number (e.g., 1234).
• "PASSWORD" - Password for key derivation.
• "DB_FILE" - SQLite database file name (e.g., "SQLITE.db").
• "KEY_ITERATIONS" - Number of iterations for key derivation (e.g., 100000).

How to Run

1. Start the Server

   • Run server.py to start the server:

     python server.py
     

   • The server will begin listening for incoming client connections.

2. Send a Message from the Client

   • Run client.py and follow the prompts to enter a username and message:

     python client.py
     

   • The client encrypts the message and sends it to the server. The server then stores the encrypted message, username, and IV in the database.

3. Validate Stored Messages (Optional)

   • To view and decrypt stored messages in the database, run validation.py:

     python validation.py
     

   • This script will output both the encrypted data and the decrypted (original) messages for verification.

Notes

• Ensure server.py is running before starting client.py.
• Each message and username is encrypted with a unique IV for security.
• Modify the settings in config.json as needed for your environment.

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