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Active databases have been used in many different fields to accomplish many different tasks. One of the main problems today that still have not been solved is authorization. In some situations it is enough that user knows e.g. password, in other situations it is enough that user posses e.g. a smart card, but, there are also situations where user's unique physical or psychological characteristics need to be measured. In this paper, the authors are going to put accent on this third possibility.
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