Importance

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Abstract

In the context of the method for operating an ID-based access control system comprising at least one central server (4) and at least one access control device (2) which can be connected to the at least one central server (4) for the purposes of data communication, each access control device (2) has a zone assigned to it that has a unique zone ID. If a customer medium (1) is registered for the first time with respect to the validity of an access authorization by an online access control device (2) assigned to this zone, an offline data record is written to the customer medium (1), which, in the event that an access control device (2) in the same zone is offline and registers the customer medium (1), is read by the offline access control device (2) and used to determine the validity of the access authorization assigned to the ID of the customer medium (1). The offline data record contains temporal validity information, and in the event that several zones are provided, zone-related validity information, which makes it possible to determine the validity of an access authorization assigned to the ID of the customer medium (1). The offline access control transaction data is stored by the access control device (2) and forwarded to the central server (4) as soon as the access control device (2) returns to an online mode.

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First Claim