基于Arnold变换的数字栅格地图数据置乱

Digital Raster Map Data Scrambling Based on Arnold Transformation

采用数据置乱的方法,利用Arnold变换对数字栅格地图的像素位置进行置乱处理,使地图数据表现为混乱无序的图像,以达到数据加密的目的。依据数字地图数据特点,提出了相应的地图数据置乱方法以及合理的置乱数据恢复方法,并编程对置乱与还原效果及程序运行效率进行了验证。证明所提出的算法可以以较高的效率实现数字栅格地图数据的置乱与恢复,以保证地图数据的信息安全。

The encryption of digital raster map data with the methodology of image scrambling was studied.The locations of every pixels of digital raster map were scrambled based on Arnold transformation.Considered the characteristics of digital raster map data,the corresponding scrambling algorithms and anti-transformation algorithms were proposed.The performance of scrambling and recovery,as well as the efficiency of the algorithms were tested with software developed independently.It is demonstrated that the algorithms could scramble and recover digital raster maps with high efficiency to ensure the information security of maps.