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Journal of Fujian Normal University

Improved Quantum Secret Sharing Protocol Via Quantum Encryption

Qian Pen

Published Jan 1, 2015• 0 citations
OpenAlex

Abstract

The quantum secret sharing protocol based on the protocol presented by Bagherinezhad and Karimipour which had been shown to be insecure has been improved. The improved protocol not only solve the security problem but also save resource and increase detecting rate,and the most important character in the improved protocol is even if the eavesdropping had been gave up halfway,there still was some probability to detecting eavesdropping.

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The quantum secret sharing protocol based on the protocol presented by Bagherinezhad and Karimipour which had been shown to be insecure has been improved. The improved protocol not only solve the security problem but also save resource and increase detecting rate,and the most important character in the improved protocol is even if the eavesdropping had been gave up halfway,there still was some probability to detecting eavesdropping.
Analyzing carefully an experimentally feasible non-entangled single qubit quantum secret sharing protocol and its modified version [Phys. Rev. Lett. 95, 230505 (2005); \textit{ibid}. 98, 028902 (2007)], it is found that both versions are insecure against coherent attacks though the original idea is so remarkable. To overcome this fatal flaw, here we propose a protocol with a distinct security checking strategy, which still involves single qubit operations only, making it possible to achieve better security of quantum secret sharing with current technology.
To improve the security of quantum cryptography protocol and reduce its cost, this paper presented a new means after analyzing the process of the detection of eavesdropping, and offered a quantum secret sharing protocol to argue for it. Players employed the travel particles carrying secret messages to detect eavesdropping, and leaked nothing about secret messages. Investigation shows that players can make the quantum cryptography protocol not only with theoretic efficiency of 100%, but also secure in case of none checking particles made for detection of eavesdropping only.
A new quantum secret sharing protocol based on the ping-pong protocol of quantum secure direct communication is proposed. The pairs of entangled qutrits are used in protocol, which allows an increase in the information capacity compared with protocols based on entangled qubits. The detection of channel eavesdropping used in the protocol is being implemented in random moments of time, thereby it is possible do not use the significant amount of quantum memory. The security of the proposed protocol to attacks is considered. A method for additional amplification of the security to an eavesdropping attack in communication channels for the developed protocol is proposed.