FST-01 (Flying Stone Tiny ZERO-ONE) is a tiny USB 32-bit computer based on a free (as in freedom) hardware design. NeuG is an implementation of a true random number generator (TRNG) for STM32F103 MCU.
In this product, a standalone USB version of NeuG is installed, together with a USB Mass Storage Class device implementation named Fraucheky. It uses the thread library Chopstx. NeuG, Fraucheky, and Chopstx are licensed under the GNU GPLv3.
For more information, please read https://www.fsf.org/blogs/gnu-press/neug-trng.