| Quantum cryptography is a research hotspot in recent years, which use the unique properties of quantum mechanics, breaking the traditional restrictions on cryptography, to achieve absolute security of information transmission. Power industry is an important basic industry in our country, which undertakes the important mission of providing for the economic and social’s development and plays an important role on the country’s economic development. So the security of information transmission is highly demanded. Because of the high open in the future smart grid’s information transmission, quantum encryption technology is of great research value. Based on this, this paper provides a new direction of research in the secondary power system’s communication in the safe zones.Studied in this paper mainly includes three parts:First, because of quantum key distribution protocols can not provide authentication, we gave a kind of BB84protocol which can provide the authentication based on quantum characteristics,which can identify the legitimate correspondents and effectively prevent the illegal third party stealing the information. Secondly, We have finished the simulation of quantum key distribution protocol on the computer and have been gained the negotiatory quantum key. Combining the results of quantum key simulation and DES algorithm, we designed a quantum key encryption system to complete the information encrypted process completely.Finally, combining the Power secondary system’s all relevant industry, data flows and security requirements, on the basis of former work content, in this final part, we design the secondary system secure communications systems to achieve cipher text transmission. In the system, we achieve the file’s One-way transmission and Two-way transmission between the safe zones, there are also file sharing and instant messaging and other function in this system. |
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