作　　者： ; (吴国华）;

机构地区： 华南理工大学理学院

出　　处： 《华南理工大学学报（自然科学版）》 2007年第6期43-45,49,共4页

摘　　要： 为了提高量子密钥的分发效率,降低信道要求,并在密钥分发过程中实现身份认证,提出了一种新的量子密钥分发协议,在该协议中载波光子的发送与接收仅由一方完成.该协议只有一条量子信道,通过在量子信道的中段对光子进行偏振调制,可将欲传递的信息附加到光子上;同时,该协议通过通信双方的共享信息进行身份认证,避免了以往同类协议中不安全的经典信道.该协议属于偏振光类型的量子传输协议.当收发均由一方进行时,能有效地提高光子的利用效率,并增强安全性能. In order to increase the distribution efficiency in the quantum key distribution （QKD） process, decrease the channel requirements and finish the user identification process at the same time, a new QKD protocol with only one quantum channel is proposed, in which the sending and receiving processes of carrying photons are performed just by one of the communicators. By modulating the photon polarization in the middle part of the quantum channel, the information to be sent can be added to the photons. Furthermore, by sharing the information with identification communicators, the unsafe classical channel in the traditional similar protocols can be avoided. The proposed protocol is a kind of polarized light-type QKD protocol with the sending and receiving processes being carried out only by one communicator. Thus, it can effectively improve the photon utilization rate and enhance the transmission security.

关 键 词： 量子密钥 密钥分发 测不准原理 身份认证 传输效率

领　　域： [电子电信] [电子电信]