Comment on "secure quantum private information retrieval using phase-encoded queries"

Authors

Runhua Shi, Anhui UniversityFollow
Yi Mu, University of WollongongFollow
Hong Zhong, Anhui University
Shun Zhang, Anhui University

RIS ID

112063

Publication Details

Shi, R., Mu, Y., Zhong, H. & Zhang, S. (2016). Comment on "secure quantum private information retrieval using phase-encoded queries". Physical Review A - Atomic, Molecular, and Optical Physics, 94 (6), 066301-1-066301-4.

Abstract

2016 American Physical Society.In this Comment, we reexamine the security of phase-encoded quantum private query (QPQ). We find that the current phase-encoded QPQ protocols, including their applications, are vulnerable to a probabilistic entangle-and-measure attack performed by the owner of the database. Furthermore, we discuss how to overcome this security loophole and present an improved cheat-sensitive QPQ protocol without losing the good features of the original protocol.