Attack-resistant quantum random number generator based on the interference of laser pulses with random phase

A system for random number generation includes a laser pulse driver; a laser diode emitting laser pulses; a fiber optic unbalanced interferometer transforming laser radiation phase noise into amplitude modulation; an optical circulator / isolator that is used to prevent unwanted feedback into a laser cavity; a photodetector that detects the laser pulses from the interferometer; a digitizer that digitizes an output of the photodetector; a statistics control ( SC ) block that is used to calculate the probability density of the photodetector's output and to define a parameter 1 that is related to a classical - to - quantum noise ratio and allows estimating ran dom operation and providing attack resistance of the system; and a processor that receives the digitized output from the digitizer and outputs a true random bit sequence .