Cryptanalysis of the efficient two-party quantum private comparison protocol with decoy photons and two-photon entanglement

Details Cryptanalysis of the efficient two-party quantum private comparison protocol with decoy photons and two-photon entanglement Cryptanalysis of the efficient two-party quantum private comparison protocol with decoy photons and two-photon entanglement

2012-04-20

arxiv.org/abs/1204.4587v1

Physics

Quantum Physics

5 pages

Scientific paper

We analyze the security of the efficient two-party quantum private comparison protocol with decoy photons and two-photon entanglement. It is shown that the compromised third party (TP) can obtain the final comparison result without introducing any detectable errors in the standard semi-honest model. The attack strategy is discussed in detail and an improvement of this protocol is demonstrated. The idea of our attack might be instructive for the cryptanalysis of quantum cryptographic schemes.

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