Spatial Privacy-Preserving Enforcement Based on the Feature Constraints

At present,geographic data has become an important information base for decision-making in different application areas. In order to meet the public demand for geographic data sharing as well as achieve privacy protection during data access,there have been multiple spatial access control models,but most of them can not achieve fine-grained access control to geographic feature objects,therefore,a spatial access control model based on attribute constraints is proposed, in which, location attributes are added to users, and attribute constraints (semantic attributes and geometry attributes) are introduced during the authorization. Then, the method is proposed to enforce semantic attribute constraints and topological relation constraints,and it is focused on analyzing the complex topological constraint combinations.Finally,a prototype system is developed to verify the feasibility of the model within limited rules.