AES256 two way radio, pc-based

Overview

This project implements a secure voice communication system, designed for use in hostile environments, including military operations, guerrilla warfare, and apocalyptic scenarios. The system leverages advanced encryption, error correction, and modulation techniques to ensure reliable and confidential voice transmission over radio frequencies.

Features

• AES-256 Encryption: Ensures the confidentiality of transmitted messages.
• Reed-Solomon Error Correction: Enhances the reliability of data transmission by correcting errors introduced during transmission.
• AFSK Modulation: Converts digital data to audio signals for transmission over standard radio frequencies.
• Graphical User Interface: Simplifies user interaction and setup.

Prerequisites

• Python 3.6 or higher
• Required Python packages: numpy, sounddevice, reedsolo, cryptography, tkinter
• Audio input and output devices for testing and operation

Installation

Install Python 3.6 or higher. Install the required packages: pip install numpy sounddevice reedsolo cryptography

Usage

Running the Application

Connect your radio mic line to a pc headphones line (not the headphones line you will use to listen)

Connect your radio headphones line to a pc mic line (not the mic line you will use to speak into)

Save the provided Python script in a file named AES256_radio.py.

Execute the script:

python AES256_radio.py

Interface Description

• Password Entry: Enter a password to generate the encryption key.
• Device Selection: Select audio input and output devices for both user and radio interfaces.
• Start Communication: Begin the encrypted voice communication process.

Main Technical Functions

Key Generation and Derivation

• generate_key_from_password(password: str) -> str
• get_key_from_password(password: str, encoded_key: str) -> bytes

Encryption and Decryption

• encrypt_message(message: bytes, key: bytes) -> str
• decrypt_message(encrypted_message: str, key: bytes) -> bytes

AFSK Modulation

• text_to_afsk(text, baud_rate=1200, mark_freq=1200, space_freq=2200, sample_rate=48000)
• afsk_to_text(signal, baud_rate=1200, mark_freq=1200, space_freq=2200, sample_rate=48000)

Reed-Solomon Encoding

• encode_reed_solomon(data)
• decode_reed_solomon(data)

Preamble Handling

• add_preamble(data, preamble="101010101010")
• remove_preamble(data, preamble="101010101010")

Transmission and Reception

• transmit_message(key, message_text)
• receive_message(key, afsk_signal)

Example Workflow

• Key Generation: Generates an encryption key from the provided password.
• Message Encryption: Encrypts the input message.
• Error Correction: Applies Reed-Solomon encoding.
• Preamble Addition: Adds a preamble for synchronization.
• Modulation: Converts the message to an AFSK signal for transmission.
• Reception: Receives the AFSK signal and reverses the above steps to retrieve the original message.

Important Notes

Ensure that the same password is used on both the transmitting and receiving ends to generate matching encryption keys.

Test the system thoroughly in a controlled environment before deploying it in real-world scenarios.

The system relies on proper selection of audio devices for effective operation. Verify device configurations and compatibility.