Enhanced security for multi-detector quantum random number generators. (23rd November 2016)

• Record Type: Journal Article
• Authors: Marangon, Davide G; Vallone, Giuseppe; Zanforlin, Ugo; Villoresi, Paolo
• Is Part Of: Quantum science and technology. Volume 1:Number 1(2016)
• Publication Date: 2016-11-23
• Subjects: qrng -- quantum random number generator -- entropy -- randomness -- quantum randomness -- detector array -- security; Quantum theory -- Periodicals; Quantum theory; Periodicals; 530
• DOI: 10.1088/2058-9565/1/1/015005
• Languages: English
• ISSNs: 2058-9565

Abstract

Abstract: Quantum random number generators (QRNG) represent an advanced solution for randomness generation, which is essential in every cryptographic application. In this context, integrated arrays of single-photon detectors have promising applications as QRNGs based on the spatial detection of photons. For the employment of QRNGs in cryptography, it is necessary to have efficient methods to evaluate the so-called quantum min-entropy that corresponds to the amount of the true extractable quantum randomness from the QRNG. Here, we present an efficient method that allows the estimation of the quantum min-entropy for a multi-detector QRNG. In particular, we consider a scenario in which an attacker can control the efficiency of the detectors and knows the emitted number of photons. Eventually, we apply the method to a QRNG with 10 3 detectors.