Edoardo Charbon

We present two different QRNG devices which allow to maximize the entropy extraction of a system and so the generation rate. The two devices use single-photon avalanche diode along (SPAD) with FPGA device. The first device, Randy, uses only one SPAD and with a post-processing based on the Peres algorithm [Y. Peres, Ann. Statist. 20, 590 (1992)], has a generation rate of 1.8 Mbit/s. The second device, LinoSPAD, which is a CMOS SPAD array based device and integrate also a time-to-digital converter (TDC) on its FPGA, has a final generation rate of 310 Mbit/s thanks to a improved post-processing procedure which also includes the Zhou-Bruck algorithm [H. Zhou and J. Bruck, arXiv:1209.0726 (2012)].

In security applications, it is necessary to use random numbers with the highest possible entropy. Quantum Random Number Generators (QRNG) are most suitable for creating such numbers due to the non-deterministic nature of quantum physics. In this work we present the different steps of the construction of a new design for a high-speed QRNG. Furthermore, in order to make our QRNG suitable for use in security applications, we explain the steps we are taking to make it conform to security standards. Such standards exist and define guidelines for the design of classical Random Number Generators. However, for QRNG, it is necessary to make adaptations, which requires additional work in its design, realization and evaluation with respect to security standards.