| Electric power is an important energy source in the development of national economy. It plays an essential role in national economic and social development. During reform and development, electric enterprises seize the opportunity of information technology booming, and start large-scale information technology application. Great progress has been made, but mass data isolation is also formed. Many business systems can't be integrated and information can't be shared. Enterprise information portal is able to protect original investment for electric enterprises and avoid hindrance of information isolation to their development. Therefore, it is feasible to establish appropriate information portal for electric enterprise, which can improve work efficiency and foster national economy to some extent.This paper discusses the main function of Single Sign On (SSO) System in electric enterprises, and explores its structure and digital signature on J2EE platform, which realizes integration of application system. The whole paper is divided into several parts. First, it analyzes major problems in electric enterprises during informatization and puts forward some solutions. SSO system's main function is also explained in detail. Second, digital signature technology on J2EE platform is elaborated and various login mode is also advanced. Finally, The paper talks about the realization of SSO system, including module of login, users' administration, department administration, business system management, digital certificate management, system setup, business reminder and business system automatic login.Through discussion of each system module and its application with features of enterprise information portal, this study proposes a feasible SSO system, which is of great significance to the improvement of work efficiency and enhancement of competitiveness for electric enterprises. |
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