New circular quantum secret sharing for remote agents

Authors:
Jason Lin;Tzonelih Hwang
Affiliations:
Department of Computer Science and Information Engineering, National Cheng Kung University, Tainan City, Taiwan, ROC 70101;Department of Computer Science and Information Engineering, National Cheng Kung University, Tainan City, Taiwan, ROC 70101
Venue:
Quantum Information Processing
Year:
2013

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Abstract

This study presents a novel circular quantum secret sharing (QSS) protocol based on the controlled-NOT (CNOT) gate for remote agents. A CNOT gate is able to entangle a Bell state and several single photons to form a multi-particle GHZ state. Using this technique, the proposed QSS scheme is designed in purpose to be congenitally free from the Trojan horse attacks. Moreover, for each shared bit among n party, the qubit efficiency has reached $${\frac{1}{2n+1}}$$ , which is the best among the current circular QSS's.