Multiparty quantum private comparison with almost dishonest third parties for strangers

Shih Min Hung, Sheng Liang Hwang, Tzonelih Hwang, Shih Hung Kao

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)


This study explores a new security problem existing in various state-of-the-art quantum private comparison (QPC) protocols, where a malicious third-party (TP) announces fake comparison (or intermediate) results. In this case, the participants could eventually be led to a wrong direction and the QPC will become fraudulent. In order to resolve this problem, a new QPC protocol is proposed, where a second TP is introduced to monitor the first one. Once a TP announces a fake comparison (or intermediate) result, participants can detect the fraud immediately. Besides, due to the introduction of the second TP, the proposed protocol allows strangers to compare their secrets privately, whereas the state-of-the-art QPCs require the involved clients to know each other before running the protocol.

Original languageEnglish
Article number36
JournalQuantum Information Processing
Issue number2
Publication statusPublished - 2017 Feb 1

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Statistical and Nonlinear Physics
  • Theoretical Computer Science
  • Signal Processing
  • Modelling and Simulation
  • Electrical and Electronic Engineering


Dive into the research topics of 'Multiparty quantum private comparison with almost dishonest third parties for strangers'. Together they form a unique fingerprint.

Cite this