Cheat sensitive quantum bit commitment via pre- and post-selected quantum states

Authors:
Yan-Bing Li;Qiao-Yan Wen;Zi-Chen Li;Su-Juan Qin;Ya-Tao Yang
Affiliations:
State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing, China 100876 and State Key Laboratory of Information Security, Institute o ...;State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing, China 100876;Beijing Electronic Science and Technology Institute, Beijing, China 100070;State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing, China 100876;Beijing Electronic Science and Technology Institute, Beijing, China 100070
Venue:
Quantum Information Processing
Year:
2014

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Abstract

Cheat sensitive quantum bit commitment is a most important and realizable quantum bit commitment (QBC) protocol. By taking advantage of quantum mechanism, it can achieve higher security than classical bit commitment. In this paper, we propose a QBC schemes based on pre- and post-selected quantum states. The analysis indicates that both of the two participants' cheat strategies will be detected with non-zero probability. And the protocol can be implemented with today's technology as a long-term quantum memory is not needed.