RFDom

Hardware random number generator using radio frequency noise from RTL-SDR devices.

Blog article here

Overview

RFDom provides a drop-in replacement for Python's random module that generates cryptographically strong random numbers from atmospheric radio noise. It uses an RTL-SDR device to capture IQ samples, converts them to seeds via phase angle analysis and SHA-256 hashing, and feeds these into an LCG for deterministic random number generation.

Requirements

• RTL-SDR device
• RTL-TCP server running (e.g., rtl_tcp -a 0.0.0.0)
• Python 3.x

Installation

pip install rfdom

Or from source:

git clone https://github.com/douxxtech/rfdom.git
cd rfdom
pip install -e .

Usage

from rfdom import RFDom

# Connect to RTL-TCP server
rng = RFDom(host="192.168.1.185", gain=49.6)

# Use like Python's random module
print(rng.random())                 # 0.0 to 1.0 [0.0, 1.0)
print(rng.randint(1, 100))          # Random integer [1, 100]
print(rng.choice(['a', 'b', 'c']))  # Random choice
print(rng.gauss(0, 1))              # Gaussian distribution

Supported Methods

• random(), uniform(), randint(), randrange()
• choice(), choices(), sample(), shuffle()
• gauss(), expovariate()

License

This project is licensed under the GNU General Public License v3.0. See LICENSE for details.