Scheme of quantum private comparison via Bell states and Bell entanglement swapping

Abstract

Abstract: A new quantum private comparison (QPC) protocol using Bell states and Bell entanglement swapping is proposed and analyzed. In the proposed protocol, we utilize Bell states as the quantum resources, and further perform Bell measurements and entanglement swapping as the main operations for dealing with the private comparison of equal information without revealing their information content. TP prepares Bell states and decoy photons, he inserts decoy photons to sequences which he want to send to users for security. Users don’t require to do any local unitary operations and only need to perform Bell measurements, then they send their sequences after they coding their private information respectively. TP can achieve the comparison of two bits of classical information by simple calculation. Finally, TP announced the result of the comparison. In addition, the correctness and security of our protocol are discussed.

Key words: quantum information, quantum private comparison, Bell measurements, entanglement swapping, security

CLC Number:

0431

SUN Xin-mei, ZHA Xin-wei, LI Ning. Scheme of quantum private comparison via Bell states and Bell entanglement swapping[J]. J4, 2013, 30(5): 579-585.

References

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