verification, 1:1 matching is a method of examining one biometric record against another in order to determine whether the two match are equivalent or not. This is the type of biometric match that occurs, for instance, when a biometric system is set up for card + finger matching. The user swipes a card, which tells the biometric reader who the user is supposed to be. The user then proves his / her identity by scanning a finger on the device. This type of matching is very fast and accurate, and has been in use for some time. By contrast, 1:n matching is a means of identifying a person against a broad database of other users simply by means of a fingerprint. In this scenario, no PIN numbers or cards are required. The user simply places his / her finger on the fingerprint reader, and a very rapid search is initiated in order to find and verify the userís identity. This type of matching is more convenient since no PIN numbers or cards are required.