A Quantum Network System of QSS-QDC Using χ-Type Entangled States
Chang Ho Hong1, 2,Jin O Heo1, 2,Jong in Lim1, 2,Hyung jin Yang1, 2, 3**
1Graduate School of Information Management and Security, Korea University, Sungbuk-gu Anam 5-ga, Seoul, South Korea 2Center for Information Security Technologies (CIST), Korea University, Seoul, South Korea 3Department of Physics, Korea University, Chochiwon, Choongnam, South Korea
A Quantum Network System of QSS-QDC Using χ-Type Entangled States
Chang Ho Hong1, 2,Jin O Heo1, 2,Jong in Lim1, 2,Hyung jin Yang1, 2, 3**
1Graduate School of Information Management and Security, Korea University, Sungbuk-gu Anam 5-ga, Seoul, South Korea 2Center for Information Security Technologies (CIST), Korea University, Seoul, South Korea 3Department of Physics, Korea University, Chochiwon, Choongnam, South Korea
A multiuser quantum direct communication network system for N users utilizing χ−type entangled states is proposed. The network system is composed of a communication center, N users, and N quantum lines linking the center and the N users. There is no quantum line among users, and therefore only N quantum lines are necessary for communication between users. Using one χ-type entangled state, in this protocol we are able to send two bits of information through direct communication and, at the same time, share two bits of quantum keys. The security of the protocol is then analyzed.
A multiuser quantum direct communication network system for N users utilizing χ−type entangled states is proposed. The network system is composed of a communication center, N users, and N quantum lines linking the center and the N users. There is no quantum line among users, and therefore only N quantum lines are necessary for communication between users. Using one χ-type entangled state, in this protocol we are able to send two bits of information through direct communication and, at the same time, share two bits of quantum keys. The security of the protocol is then analyzed.
Chang Ho Hong,Jin O Heo,Jong in Lim,Hyung jin Yang,**. A Quantum Network System of QSS-QDC Using χ-Type Entangled States[J]. 中国物理快报, 2012, 29(5): 50303-050303.
Chang Ho Hong,Jin O Heo,Jong in Lim,Hyung jin Yang,**. A Quantum Network System of QSS-QDC Using χ-Type Entangled States. Chin. Phys. Lett., 2012, 29(5): 50303-050303.
2012, Vol. 29 
