Quantum Communication Protocol Desigh And Protocol Security Research

With the emergence of network parallel technology, the traditional cryptographic system, which is based on computational complexity, is seriously threatened. Quantum communication has attracted a lot of attention in scientific research as well as military area by virtue of its high efficiency and safety. The quantum communication system has improved constantly, techniques as quantum teleportation, dense coding, quantum key distribution and quantum secure direct communication have greatly enriched the research field of quantum communication.Quantum communication is a cross research of quantum theory and information theory with unconditional security and transmission efficiency, which can make use of the entanglement property of quantum physics. Quantum entanglement is the core of quantum properties, together with security detection schemes it protects the security of quantum communication. Although there have been some security detection strategies, their detection efficiency is not high and still has much room for improvement, meanwhile most existing security protocols were established under ideal conditions lacking of security detection strategies in noise environment.Therefore, to enhance the efficiency of eavesdropping detection in the quantum secure direct communication protocol, improved two-step quantum secure direct communication protocols based on four-particle Genuine state and W-class state are presented respectively. In this design, four-particle Genuine state and W-class state are inserted into the transport stream innovatively for eavesdropping detection, to find out whether there is an eavesdropper during quantum communication using Matlab to analyze the specific data. The two improved security detection schemes presented in this paper are of higher efficiency, which are proved progressive safety by a complex security analysis using the theory of information entropy.