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为了提高量子通信数据传输效率和传输过程的可控性,我们设计了一种多维量子的受控量子安全直接通信的方案。方案中,信息发送者(Alice)、信息接收者(Bob)共享多维Bell态粒子。在确认信道安全后,Alice制备编码过的多维单光子序列,然后通过对单光子执行量子受控非操作,使单光子和多维Bell态建立纠缠关系,接着Alice公布自己对手中的粒子的测量结果,控制者(Charlie)对自己手中的粒子进行单粒子的测量。Bob在获得Charlie信息时可以恢复出秘密信息,在未获得Charlie许可的情况下,Bob不能恢复秘密信息。最后采用熵理论和窃听检测分析协议的安全性,证明该方案是安全可靠的,同时和文献~([11])相比每量子位的窃听探测率提高了11%,最后计算在四维Bell态下该协议经典的传输效率为181.8%,量子比特效率为33.3%。
In order to improve the transmission efficiency of quantum communication and the controllability of the transmission process, we design a scheme of multi-dimensional quantum controlled direct communication of quantum safety. In the scheme, Alice and Bob share multi-dimensional Bell state particles. After confirming the channel security, Alice prepares encoded multi-dimensional single-photon sequences and then establishes the entanglement relationship between the single-photon and the multi-dimensional Bell states by performing a quantum controlled non-operation on the single photons. Alice then publishes the measurements of his opponent’s particles , The controller (Charlie) on the hands of their particles single particle measurement. Bob retrieves confidential information as he obtains Charlie’s information and Bob can not recover the confidential information without Charlie’s permission. Finally, entropy theory and eavesdropping detection are used to analyze the security of the protocol, which proves that the scheme is safe and reliable. Compared with the literature [11], the detection rate of eavesdropping per qubit is increased by 11% Under this protocol, the classical transmission efficiency is 181.8% and the quantum bit efficiency is 33.3%.