采用区块链技术的卫星编队组网安全认证设计

当前，卫星需要完成的空间任务越来越复杂，单颗卫星已经不能满足日益增长的任务需求，由多颗小卫星组成卫星编队系统协同完成任务已成为一种趋势。然而，更多卫星带来了更多挑战，例如卫星之间的安全认证以避免非合作卫星的恶意入侵。当前的卫星安全认证需落地在地面中心完成，时效性难以满足卫星编队安全认证的需求。具有去中心化、分布式信任存储、加密算法等功能的区块链技术能够在编队的卫星间执行分布式安全认证，而不必落地在地面中心完成安全认证。在深入分析卫星编队面临的安全问的基础上，提出了基于区块链的卫星安全认证技术，设计了适用于卫星编队的消息验证方案。通过对比各种加密算法的时间开销，证明使用椭圆加密算法用时最短。

Design of security certification of satellite formation using blockchain technology

Recently,the space task for satellite has become more and more complicated,which leads that single satellite cannot meet the growing needs of space task.Thus,several small satellites working together as satellite formation to finish jobs has become a trend.However,more satellites mean more challenges,such as the security certification among satellites to avoid malicious invasion of non-cooperative satellite.Current security certification of satellite should be done in the ground operation center,whose time consumption cannot meet the need of the security certification of satellite formation.With such characteristics as decentralization,distributed trusted storing and encryption algorithm,blockchain can be used to execute distributed security certification among satellites in the satellite formation.Thus,there is no necessary to do security certification in the ground operation center.The security issues of satellite formation is deeply studied in this paper,and the security certification technology of satellite formation based on blockchain is proposed.The information test plan for satellite formation is designed,and through the time consuming value contrast of several encryption algorithms,it is proved the ellipse encryption algorithm has the minimal time consuming.