Hierarchical Access Control Of Vector Geographic Data Based On Security Classification Identifies

Vector geographic data is an important resource for the construction of the national fundamental geographic information and the main content of GIS applications and its security is related to the good functioning and rapid development of geographic information systems industry.However,the existing vector geographic data security solutions focus on outer net data security excessively,but ignore the importance of intranet data security.The related statistical results of domestic and international statistical agencies also show that losses due to outer net security problems account for only 20%of all losses and losses due to intranet security problems account for 80%and this figure is also rising.Therefore,the study about the intranet geographic vector data security solution is crucial.Considering of the current demand of data security classification and situation within the network data security protection,according to the characteristics of vector geographic data,this article study security classification identifies' application in protection of secretive geographic vector data.On this basis of security classification identifies,this article establish the geographic vector data access control model,solve the embedding and extraction method of the security classification identifies,the visible label of security classification identifies,secure transmission of distributed office and other technical issues,achieve the vector geographic data access control based on security classification identifies in a file filter driver level.The main contents and conclusions of this article are as follows:(1)Access control model of vector geographic data based on expanding role.Considering the problems of existing models,such as role management complexity and low security,this article used security classification identifies to expand on the traditional roles of role-based access control model,combined the characteristics of geographic data vector,such as space and timing,and established expanding role-based access control model.It can be used to vector geographic data access control and improve data security.(2)Vector geographic data pivotal access control technology.Considering the imperfect system and management of intranet data security solutions,through the file filter driver module,write security classification identifies in information,combined with distributed key of management center,to realize dynamic transparent encryption and decryption of information,making secret file can only be accessed by users with the appropriate permissions.At the same time,this article use the secure transmission technology and the visible mark of security classification identifies,to solve data leakage and the unconscious distributed problems,and get a complete network data security solutions.(3)Establish geographic vector data access control prototyping system based on security classification identifies.Combining earlier studies of access control technology,established a complete prototype access control system,and realize the relevant policies and rules of vector geographic data access control model,so as to protect intranet data security well.Study of vector geographic data access control method can improve the current status of the intranet data security protection,provide new ideas to data security within the network of enterprises and institutions and promote the improvement and protection of security research of vector geographic data.