Continuous-variable quantum authentication of physical unclonable keys: Security against an emulation attack

Georgios M. Nikolopoulos
Phys. Rev. A 97, 012324 – Published 22 January 2018

Abstract

We consider a recently proposed entity authentication protocol in which a physical unclonable key is interrogated by random coherent states of light, and the quadratures of the scattered light are analyzed by means of a coarse-grained homodyne detection. We derive a sufficient condition for the protocol to be secure against an emulation attack in which an adversary knows the challenge-response properties of the key and moreover, he can access the challenges during the verification. The security analysis relies on Holevo's bound and Fano's inequality, and suggests that the protocol is secure against the emulation attack for a broad range of physical parameters that are within reach of today's technology.

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  • Received 27 October 2017
  • Revised 8 January 2018

DOI:https://doi.org/10.1103/PhysRevA.97.012324

©2018 American Physical Society

Physics Subject Headings (PhySH)

Quantum Information, Science & TechnologyAtomic, Molecular & Optical

Authors & Affiliations

Georgios M. Nikolopoulos*

  • Institute of Electronic Structure & Laser, FORTH, P.O. Box 1385, GR-70013 Heraklion, Greece

  • *nikolg@iesl.forth.gr

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Issue

Vol. 97, Iss. 1 — January 2018

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