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An access control system has the role to verify and mediate attempts made by users to access resources in a system. An access control system maps activities and resources to legitimate users. This paper presents a distributed smart card based access control system for a building. The system is Internet centered. Each door has a control access point and all these are connected to a server which will grant or not the access. A user requests access by using a smart card which memorizes the user's unique identity code.