Access authorisation misuse recognition method

摘要

The method concerns the use of chip cards for access to some service or installation and the use of writing and reading units for evaluating and checking the identity of the person possessing the card, in association with a central computer of the service or the monitoring equipment. These units read the data in the card and pass the data to the evaluating and deciding unit. Depending on the result, access to the facility or service is granted or refused. Each interaction generates a dynamic key for the next interaction or transaction, and this cannot be known by any unauthorised person, but only by the subscriber's station from the last transaction.