An Android library project enabling quantum random number generation using device camera.
CamRNG provides two types of generators that generate random numbers using different methods.
NoiseBasedCamRng generates random numbers by extracting image noises into random bits and
ImageBasedCamRng generates random numbers by hashing the images taken by the camera.
NoiseBasedCamRng can extract randomness from both shot noise and thermal noise. Shot noise or
quantum noise is the noise that dominates the lighter parts of an image. It is caused by the
variance of the number of photons detected by the photodiodes on the camera sensor per unit of time.
It can be used as the source of randomness by having a setup as shown in the following illustration.
Thermal noise or Johnson-Nyquist noise is the noise that dominates the black parts of an image. It is caused by the thermal agitation of the electrons in the camera sensor. It can be used as the source of randomness by blocking the camera lens as shown in the following illustration.
ImageBasedCamRng generates random numbers by continuously taking images and applying SHA-512 to
them. Unlike NoiseBasedCamRng that needs additional setup to work, ImageBasedCamRng can generate
high-quality randomness by pointing the camera at anything at the cost of a lower bitrate.
Download via Gradle:
implementation 'com.wasisto.camrng:camrng:5.0.1'
Visit CamRNG Wiki
Copyright (c) 2020 Andika Wasisto
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