| Development of Spaceflight Telemetry, Track and Command (TT&C) network technique represents one of the most important characteristics of a country's comprehensive national power. In recent years, China has already achieved great progress in Spaceflight TT&C network technique, along with which, the communications security problems are still outstanding. The appearance of Quantum key communications technology which based on quantum mechanics guide the Spaceflight TT&C network communications security to a new development direction.This paper analyzes the characteristics of exist simulation software, and on the basis of this, designed a multifunctional integrated quantum key communication simulation platform. This simulation platform includes the design of quantum gate circuit simulation module, quantum key distribution simulation module and the effect of presentation modules. The platform can be used for integrated simulating in quantum key communications and improving quantum key algorithm.According to relative research results on quantum key communications, this paper puts forward a secure communication model which based on quantum key distribution for Spaceflight TT&C network. Aircrafts or satellites are used as key transmission intermediary between TT&C center and TT&C station. Therefore, the aircraft, Spaceflight TT&C center and station can share the safely quantum key. Moreover, a simple simulation system is established that is used for quantum key communications in Spaceflight TT&C network. The simulation results show that the communication model mentioned above is correct and effective.This paper attempts to improve the BB84 protocol through analysis of the classical BB84 protocol, which the main idea is improving the algorithm in the stage of protocol error correction. This method enhances protocol's error-correcting performance and reinforces algorithm's execution efficiency by means of improving error-correcting capability of the dichotomy. The simulation results show that the performance of the improved BB84 protocol has improved. |
