IT managers evaluating biometric security measures should consider their organization's needs and how users will react to the technology. Analysts recommend testing the systems under realistic conditions before committing to a particular hardware. Finger scan technology is based on the fact that fingerprints have unique characteristics. The system takes a picture of the hand and examines 90 characteristics, including the three-dimensional shape of the hand, length and width of fingers, and shape of knuckles.
Background noises and voice changes can affect accuracy.
A camera captures an image of the eye's iris. Accuracy is high since every individual has unique iris patterns. Signature dynamics, such as speed, relative speed, stroke order, stroke count and pressure are analyzed. The system compares what the signature looks like with how it is signed. A camera is used to acquire an image of a face from a few feet away.