biometrics in security and personal identification, the electronic verification of individuals using biological traits, such as iris or retinal scanning,
fingerprints
, or face recognition, and the technology used in verification. The main operations involved in a biometric system are called enrollment and test; during enrollment an individual's biometric information is collected and stored, while during test the incoming information is compared against the version stored during enrollment. A functioning system typically answers three questions: Is the person who he or she claims to be (verification)? Who is the person (identification)? Is there anything special about the person, for ...