Quantum Private Comparison

Abstract

This thesis explores a new security problem existing in various state-of-the-art QPC protocols where a malicious 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 level of trustworthiness for TP is defined and 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

Date of Award	2015 Aug 28
Original language	English
Supervisor	Tzone-Lih Hwang (Supervisor)