Int J Theor Phys (2018) 57:1983–1989
Quantum Private Query Based on Bell State and Single
· Yan Chang
· Shi-Bin Zhang
· Yan Zhang
Received: 28 October 2017 / Accepted: 12 March 2018 / Published online: 22 March 2018
© Springer Science+Business Media, LLC, part of Springer Nature 2018
Abstract Quantum private query (QPQ) can protect both user’s and database holder’s pri-
vacy. In this paper, we propose a novel quantum private query protocol based on Bell state
and single photons. As far as we know, no one has ever proposed the QPQ based on Bell
state. By using the decoherence-free (DF) states, our protocol can resist the collective noise.
Besides that, our protocol is a one-way quantum protocol, which can resist the Trojan horse
attack and reduce the communication complexity. Our protocol can not only guarantee the
participants’ privacy but also stand against an external eavesdropper.
Keywords Quantum private query · Bell state · Single photons
In the last thirty decades, quantum cryptography has drawn a lot of attention. In 1984,
Bennett and Brassard proposed the first quantum key distribution protocol (QKD), as
known as BB84 . After that, a number of quantum private communication schemes
has been proposed, including quantum key distribution(QKD) [2–5], quantum secure
direct communication(QSDC) [6, 7], quantum secret sharing(QSS) [8, 9], quantum private
comparison(QPC) [10, 11], etc.
College of Information Security Engineering, Chengdu University of Information Technology,
Chengdu 610225, China
School of Computer, Beijing University of Posts and Telecommunications, Beijing 100876,