Journal
OPTICS COMMUNICATIONS
Volume 283, Issue 7, Pages 1561-1565Publisher
ELSEVIER
DOI: 10.1016/j.optcom.2009.11.085
Keywords
Quantum private comparison; Security; Efficient; Fair; Cost of classical information
Categories
Funding
- National Basic Research Program of China [2007CB311203]
- National Natural Science Foundation of China
- Council of Hong Kong joint Research Scheme [60731160626]
- National Natural Science Foundation of China [60821001, 60873191, 60903152]
- Chinese Universities Scientific Fund [BUPT2009RC0220]
- 111 Project [B08004]
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The central theme of this paper is that we propose an efficient protocol for comparing the equal information with the help of a third party (TP). We assume that TP is semi-honest, i.e., TP executes the protocol loyally, keeps a record of all its intermediate computations and might try to steal the players' private inputs from the record, but he cannot be corrupted by the adversary. The security of this protocol with respect to various kinds of attacks is discussed. Our protocol utilizes the triplet entangled states and the simple single-particle measurement. The particles carried the secret messages do not be repeatedly transmitted. The players' messages are divided into many groups. Sometimes, the protocol is already successfully completed, but all data are not compared. Thus, many time and huge quantum resources can be saved. (C) 2009 Elsevier B.V. All rights reserved.
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