  Superconducting nanowires and Josephson junctions, when biased close to
superconducting critical current, can switch to a non-zero voltage state by
thermal or quantum fluctuations. The process is understood as an escape of a
Brownian particle from a metastable state. Since this effect is fully
stochastic, we propose to use it for generating random numbers. We present
protocol for obtaining random numbers and test the experimentally harvested
data for their fidelity.
