Digital Raster Map Data Scrambling Based on Arnold Transformation

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.