关键词: 分布式卫星网络，消息篡改攻击，私钥，拒绝服务攻击

Abstract: In order to prevent data modification attack in process of privatckcy component update of satellite network node, we presented a double-encryption scheme, which can ensure integrity of data in process of private-key component update. At the same time, to prevent violent private-key component updating request from venomous node with normal identity, a mechanism was provided to judge the validity of update request time, which can resist denial of service attack from venomous node with normal identity. Finally, we compared the security and computing complexity of the scheme, it shows that by introducing low computing costs, the scheme we provided can resist data modification attack and denial of service attack.

Key words: Distributed satellite network,Data modification attack,Private-key,Denial of service attack