The Concept of Complex Events as Suitable Means for Biometric System Implementation

Generally speaking, a user (person) can be authorised in three different ways (or their combinations): one can use something that a user knows, something that a user possesses or by measuring some physical or psychological characteristics which are immanent and unique to each person i.e. biometric characteristics. In this paper we are going to put accent on this third possibility. We are going to show how active databases could be used in order to implement multimodal biometric systems, and, due to some capabilities which they possess, reduce the time needed for authorisation (identification). Especially, we will put accent on complex events and show how they can be used for identification (authorisation) purposes.