arXiv subjects

Mario Stipčević

Publications and source records attributed to Mario Stipčević.

23 records · Page 2Linked to original sources

arXiv2014

Post-Processing Free Spatio-Temporal Optical Random Number Generator Resilient to Hardware Failure and Signal Injection Attacks

We present a random number generator based on quantum effects in photonic emission and detection. It is unique in simultaneous use of both spatial and temporal quantum information contained in the system which makes it resilient to hardware failure and signal injection attacks. We show that its deviation from randomness cam be estimated based on simple measurements. Generated numbers pass NIST Statistical test suite without post-processing.

quant-ph↗

arXiv2014

A simple and robust method for characterization of afterpulsing in single photon detectors

Single photon detectors are important for a wide range of applications each with their own specific requirements, which makes necessary the precise characterization of detectors. Here, we present a simple and accurate methodology of characterizing dark count rate, detection efficiency, and after-pulsing in single photon detectors purely based on their counting statistics. We demonstrate our new method on a custom-made, free-running single photon detector based on an InGaAs based avalanche photo diode (APD), though the methodology presented here is applicable for any type of single photon detector.

quant-ph↗

arXiv2014

Preventing detector blinding attack and other random number generator attacks on quantum cryptography by use of an explicit random number generator

A particularly successful detector blinding attack has been recently demonstrated on various quantum key distribution (QKD) systems, performing for the first time an undetectable and complete recovery of the key. In this paper two original contributions are given to understanding and prevention of this attack.

quant-ph↗

arXiv2013

Characterization of a commercially available large area, high detection efficiency single-photon avalanche diode

We characterize a new commercial, back-illuminated reach-through silicon single-photon avalanche photo diode (SPAD) SAP500 (Laser Components. Inc.), operated in Geiger-mode for purpose of photon counting. We show that for this sensor a significant interplay exists between dark counts, detection efficiency, afterpulsing, excess voltage and operating temperature, sometimes requiring a careful optimization tailored for a specific application. We find that a large flat plateau of sensitive area of about 0.5 mm in diameter, a peak quantum efficiency of 73% at 560 nm and timing precision down to 150 ps FWHM are the main distinguishing characteristics of this SPAD.

physics.ins-det↗

arXiv2003

Non-deterministic random bit generator based on electronics noise

Non-deterministic random bits are needed in many scientific fields. Unfortunately today's computers are very limited in ability to produce them. We present here a method for extraction of non-deterministic random bits from random physics processes, and one practical realization of a physical generator based on it. The method is shown to deliver increasingly good randomness in the limit of slow sampling. A sample of approximately $10^9$ bits produced by the physical generator prototype is subjected to a series of well-known statistical tests showing no weaknesses.

physics.comp-ph↗