A quantum secure direct communication protocol and a multiparty quantum secret sharing protocol based on Einstein-Podolsky-Rosen pairs and entanglement swapping are presented. The present quantum secure direct communication protocol makes use of the ideal of block transmission. Different from the proposed quantum secure direct communication protocols, the sender can encode one'ssecret message as one of the four Bell states without ensuring the security of the quantum channel firstly. In the multiparty quantum secret sharing protocol, the communication parties adopt checking mode or encoding mode with some probability. It does not need multi-particles entangled state but only Einstein-Podolsky-Rosen pair to realize the protocol. Compared with the proposed quantum secret sharing protocol with entanglement swapping, it is unnecessary for the protocol to perform local unitary operation. The efficiency for the protocol is greatly improved. The securities for both the protocols are the same as that for BBM92 protocol.
参考文献
相似文献
引证文献
引用本文
王剑,陈皇卿,张权,等.基于纠缠交换的量子安全通信协议. Quantum Secure Communication Protocols on the Basis of Entanglement Swapping[J].国防科技大学学报,2007,29(2):56-60.