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Application Data Center (ADC) is a kind of application information service based on the mobile terminal system and it is provided by China Mobile to meet the demand of the group customers. By its different content, applications and services, it charges different functional fees from the group customers. When the user is using the ordered various services, he should centered on single sign-on. Therefore, the idea that the unified identity management and the access to the controlling platform is put forward. The unified identity management centered on the single sign-on and the access controlling platform can realize single sign-on through a unified identity and authority, which makes it more convenient for the user to use the system supported by several services, and reduces the user's inconvenience caused by too many application systems and accounts. Meanwhile, the centralization of the authority management realizes a unified access control so that the manager can manage the overall resources at one point. Thus the work of maintaining several systems can be reduced and the safety of the systems can be further protected.