In terms of the order of effectiveness, which of the following technologies is the most affective?

A.
Fingerprint

B.
Iris scan

C.
Keystroke pattern

D.
Retina scan

Explanation:
The order of effectiveness has not changed for a few years. It is still the same today as it was three
years ago. The list below present them from most effective to list effective:
Iris scan
Retina scan
Fingerprint
Hand geometry
Voice pattern
Keystroke pattern
Signature