【摘要】 本文首先对星载子网中的星间通信链路进行了安全需求分析,并且由协议的分布层次入手研究,明确了每一层次所需的安全服务和安全机制;然后分析了星间通信过程,针对星间通信链路的需求,对其中的敏感部分提出了所需的安全服务;最后,根据以上分析提出了星间安全通信协议的解决方案,并针对上层协议的保护和数据包的保护两种模式提出了各自的解决方案,同时采取了一系列措施以减少因为安全机制的实施而增加的空间开销。本文还以空间传输协议为例,具体实现了通信协议的安全解决方案。更多还原

【Abstract】 The first task of this thesis is to analyze the security requirements of communications link which is the important branch of the onboard network,study the layers of protocol distribution,put forward the security services and mechanisms for each layer,analyze the communications process of the onboard network,point out the requisite security services for the sensitive parts of the communications link based on its security requirements,give a security scheme of the protocol,and give the schemes to the upper layer and the data package respectively.Meanwhile,we take a series of measures to reduce the space overhead as more as possible.Finally we take the space transport protocol as an example to implement the security scheme of the communications protocol.更多还原