基于同步卫星通信网络的弱安全网络编码

Weakly Secure Network Coding Based on Synchronous Satellite Communication Networks

卫星通信能够克服地面组播通信中用户频繁变动带来的不足,但其使用无线传输媒介传递信息,会导致信息泄露。针对其星间链路上存在被窃听的威胁,构造了一种防窃听的弱安全网络编码方案。该方案中,利用阈值方案达到信源与信宿共享密钥的目的,数据传输过程中,信源首先对数据进行加密,然后再利用网络编码技术对信息进行编码并传输。由于窃听者不知道加密矩阵,因此其无法得到关于信源任何有意义的信息。本方案能够防止窃听者窃听到星间链路上传输的信息,达到了弱安全的要求,同时利用网络编码技术,提高了网络容量的利用率。

Satellite communication can overcome the defect that users frequent changing brings about in multicast communication. But u- sing wireless transmission medium to transmit information causes it easy to be wiretapped and lead to information disclosure. For there ex- ist the threat of eavesdropping in the inter-satellite links,it constructed an anti-eavesdropping network coding scheme which can reach weak security. In the scheme,it uses the threshold scheme to achieve a key share between the source and the sinks before transmit the in- formation. When transmitting the information,the source encrypted the data then used network coding techniques to encode and transmit. This program can prevent eavesdroppers listening to the information from the inter-satellite links,reach weak security while improve net- work capacity utilization by using the network coding technology.