US 12,086,570 B2
Actively stabilized random number generator
Ned J Corron, Madison, AL (US); and Jonathan N Blakely, Madison, AL (US)
Assigned to United States of America, as represented by the Secretary of the Army, Washington, DC (US)
Filed by USA as represented by the Secretary of the Army, Washington, DC (US)
Filed on Mar. 23, 2021, as Appl. No. 17/209,680.
Prior Publication US 2022/0308836 A1, Sep. 29, 2022
Int. Cl. G06F 7/58 (2006.01)
CPC G06F 7/588 (2013.01) 8 Claims
OG exemplary drawing
 
1. An actively stabilized random number generator comprising:
a random number generator which generates random symbols based on an iterated function; and
a feedback controller,
wherein the random number generator comprises:
a chaotic physical circuit that comprises both digital and analog circuitry and that realizes the iterated function, the iterated function having a single input state on an interval and a single output state within the interval, the iterated function configured to have a trajectory of iterates, wherein each iterate is within the interval, the iterated function having a positive entropy rate that defines a rate at which random information is produced;
wherein the iterated function defines a unimodal map, the iterated function having an operating parameter (β) on an interval of 1<β≤2, the operating parameter determining a slope configuration of the unimodal map, the operating parameter corresponding to the entropy rate of the iterated function, the operating parameter having a desired Markov operating point; and
wherein the feedback controller is configured to receive an output from the random number generator, to observe a maximal kneading sequence within the trajectory of iterates, and to adjust the operating parameter to the desired Markov operating point.