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      Practically secure quantum position verification

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          Abstract

          We discuss quantum position verification (QPV) protocols in which the verifiers create and send single-qubit states to the prover. QPV protocols using single-qubit states are known to be insecure against adversaries that share a small number of entangled qubits. We introduce QPV protocols that are practically secure: they only require single-qubit states from each of the verifiers, yet their security is broken if the adversaries share an impractically large number of shared entangled qubits. These protocols are a modification of known QPV protocols in which we include a classical random oracle without altering the amount of quantum resources needed by the verifiers. We present a cheating strategy that requires a number of entangled qubits shared among the adversaries that grows exponentially with the size of the classical input of the random oracle.

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          Author and article information

          Journal
          09 November 2017
          Article
          1711.03392
          46b282fa-5e21-49b9-b8bd-01f18a5d3ea7

          http://arxiv.org/licenses/nonexclusive-distrib/1.0/

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          7 pages, 1 figure
          quant-ph

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