关键词: 数据安全模型, 数据空间, 数据流分析, 数据防护

Abstract: In recent years, the rapid development of E-government generated a series of data security risks: data cannot be accurately mapped to the user and workflow, E-gov system cannot cope with new data security risks. To confront with these problems, a Security Data Space method(including 2D, 3D Security Data Space method) is presented in this paper. 2D Security Data Space build an area which has clear data ownership and boundary by sorting out the relationship between data, workflow, and user. 3D Security Data Space introducing data protection technology into 2D Security Data Space, can protect data ownership and boundary while accurately control the data flow. The Security Data Space method is applied in E-gov system and work effectively. The Security Data Space method can also be extended to other field to enhance the security of data.

Key words: data security model, data space, data flow analysis, data protection