TITLE:
Three-Party Simultaneous Quantum Secure Communication Based on Closed Transmission Loops
AUTHORS:
Xunru Yin
KEYWORDS:
Quantum Information, Quantum Cryptographic Protocol, Quantum Secure Direct Communication, Bell States
JOURNAL NAME:
Journal of Quantum Information Science,
Vol.4 No.4,
December
31,
2014
ABSTRACT: A kind of novel three-party quantum secure direct communication protocol
is proposed with the correlation of two-particle entangled state. In this
scheme the qubit transmission forms a closed loop and every one of the three
participants is both a receiver and a sender of particle sequences in the
bidirectional quantum channels. Each party implements the corresponding unitary
operations according to its secret bit value over the quantum channels and then
extracts the other two parties’ unitary operations by performing Bell
measurements on the encoded particles. Thus they can obtain the secret
information simultaneously. Finally, the security analysis shows that the present
three-party scheme is a secure protocol.