METHOD AND DEVICE FOR QUANTUM RANDOM NUMBER GENERATION

• Main Authors: BRUNNER, Nicolas, ZBINDEN, Hugo, RUSCA, Davide
• Format: Patent
• Language: English; French; German
• Published: 26.04.2023
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; PHYSICS

Quantum Random Number Generator comprising an emitting device (1) adapted to be triggered by a signal representing an input bit x and adapted to generate and send a stream of one of two possible non-orthogonal quantum states determined by a plurality of said input bit x at a rate in the range of Mb/s up to 10 Gb/s, a measurement device (2) adapted to detect each quantum state of the stream of quantum states sent by the emitting device (1) and to generate an output b based on the detected quantum state, a random selection device (3) adapted to receive said output b and carries out a random selection on said output b so as to select and pick out a first fraction of the bits b' and a second fraction of the bit b-b' sent to an entropy HminQ estimation module (4, 4'), wherein the entropy HminQ estimation module (4, 4') is adapted to receive the input x, the output b' and the output b-b' over a certain number of rounds N and to estimate the entropy HminQ of each output for each quantum state of the stream of quantum states, validating or not an extraction ratio, and at least two parallel randomness extraction devices (5, 5') adapted to carry out a hybrid extraction protocol generating two final random output bit strings via a first extractor (5') which extracts the first fraction of the bits b' with bit block sizes in a first range and generates a string of certified random bits r' at a first rate; and a second extractor (5) which extracts the second fraction of the bits b-b' with bit block sizes in a second range, higher than the first range, and generates a string of true random bits r at a second rate, higher than the first rate.