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Frontiers in Optics

A Bias Free, Quantum Random Number Generator

Wei Wei, Hong Mei Guo

Published Jan 1, 2009• 0 citations
Publisher

Abstract

Based on the random photon emission of laser diode, we propose a new approach for true random number generation with convenient implementation, which is intrinsically bias free and suitable for high speed applications.
DOI
10.1364/fio.2009.fwl4

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In this paper we present a large array of SPADs and we discuss its suitability for applications different than imaging, exploring in particular how to transform it into a high speed True Random Number Generator (TRNG). The proposed matrix comprises 512x128 independent cells that convert photons into a raw bit-stream, which, as ensured by the properties of quantum physics, is characterized by a very high level of randomness. The sequences are read out in a 128-bit parallel bus, concatenated, and pipelined onto a de-biasing filter. Our results, achieved by coupling two matrices, show that our architecture can reach up to 5 Gbit/s while consuming 25pJ/bit, to our knowledge the lowest in a TRNG to date.