Abstract

Recently years, vector map data is used in many applications and on/off-line services widely. The cost of production of vector map data is very expensive but it is stolen or copied easily by pirates without permission from the original providers. Therefore, provider desires vector map data should be encrypted before storing and transmitting to ensure the access control and prevent the illegal copying of vector map. In this paper, we proposed a perceptual encryption method for vector map based on geographical features. The geometric objects of vector map data are extracted to compute features as bounding boxes and distance vectors. After that, we encrypted those features and use them to compute and obtain encrypted vector map data. Experimental results have verified that the entire vector map is changed after encryption process. The proposed method is very effective for a large of dataset, responsive to requirements of security.