摘要
A controlled quantum secure direct communication and authentication protocol is proposed with a quantum one-time pad based on five-particle cluster state.Photon 4 in each five-particle cluster state is sent to the controller as permission.Unitary operation I(U)on photon4 according to identity-string of the receiver is used to forbid the controller to deduce secret message.The classical XOR operation serving as a one-time-pad is used to forbid external eavesdroppers to eavesdrop.Eavesdropping detection and identity authentication are implemented by previously shared reusable base identity-strings.In one transmission,one qubit of each five-particle cluster state is used as controller’s permission,and two qubits are used to transmit two classical bit information.
A controlled quantum secure direct communi- cation and authentication protocol is proposed with a quantum one-time pad based on five-particle cluster state. Photon 4 in each five-particle cluster state is sent to the controller as permission. Unitary operation I （U） on photon 4 according to identity-string of the receiver is used to forbid the controller to deduce secret message. The classical XOR operation serving as a one-time-pad is used to forbid external eavesdroppers to eavesdrop. Eavesdropping detection and identity authentication are implemented by previously shared reusable base identity-strings. In one transmission, one qubit of each five-particle cluster state is used as controller＇s permission, and two qubits are used to transmit two classical bit information.
基金
supported by the National Natural Science Foundation of China (61370203)
the Science & Technology Pillar Program of Sichuan Province of China (2013GZX0137)
the Youth Fund Project of Sichuan Province of China (12ZB017)
关键词
认证协议
一次一密
量子位
控制器
团簇
粒子
安全
量子比特
Controlled quantum secure direct communication
Quantum secure direct communication
Five-particle cluster state
Authentication
One-time pad
