Quantum Private Comparison

• Main Authors: Shih-MinHung, 洪世敏
• Other Authors: Tzone-Lih Hwang
• Format: Others
• Language: en_US
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/89468631041585029175

碩士 === 國立成功大學 === 資訊工程學系 === 103 === 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.