Abstract: The identity authentication as the first protection in the information safety is more and more important. The abuse exists in each independent identity authentication of various kinds of application systems. Setting up a unified authentication system (UAS),which can completely unify authentication,authority and administration for the user of the application systems is an important link in construction of information security system of the digital forestry platform (DFP). Based on the analyzing the characteristics of relevant techniques,the security feature of the DFP and identity authentication current situation were also analysed. This paper has put forward a new-type architecture of the unified identity authentication system which was suitable for the DFP and suer management system. At realization section,this paper mainly resolves the conservation of user status,exchange of information,and unified authentication and authorization. Meanwhile,the realization of UAS was clarified by scenes of two kinds of resources accessing in DFP and the solution of UAS.

Key words: digital forestry platform(DFP), unified authentication system(UAS)