【摘要】 随着地理信息技术的不断进步,矢量数字地图的访问、复制、存储、使用等在变得越来越方便、快捷的同时,其安全问题日益严峻,非法窃取事件时有发生.考虑矢量数字地图的海量特点、一维混沌系统的简单性以及高维混沌映射的高度复杂性,在基于二维Henon混沌系统生成混沌序列和要素点集矩阵生成的基础上,通过破坏矢量数字地图的邻域相关性和空间有序性,形成高效、安全的矢量数字地图置乱加密方法.结果表明:该方法具有一定的隐蔽性和较好的安全性,能够在加密处理效率和隐蔽安全性方面取得较好平衡,可满足矢量数字地图在安全传输、封装存储等应用的内容保密安全需要.更多还原

【Abstract】 With the continuing progress in GIS technology,the access,duplication,storage and application of vector digital map are becoming more and more convenient and efficient.At the same time,the security problem of vector digital map is becoming increasingly serious,and illegal theft takes place occasionally.Considering the mass quality of GIS vector data,the simplicity of one dimension chaos system and the complexity of high-dimensional chaos systems,this paper focuses on the scrambling encryption method of vector digital map.The methodology is composed of two phases.Firstly the chaotic sequence and feature nodes matrix was generated based on the two-dimensional Henon chaotic system.Then,the neighborhood relativity and the ordered array of spatial nodes of vector digital map were destroyed to form an efficient and secure scrambling encryption method for vector digital map.The results demonstrate that this method has good secrecy and better security,and can achieve a perfect balance between efficiency and security.In addition,it can meet the content security need for safe transmission,sealed storage and other applications of vector digital map.更多还原