"Simply put, biometric identification is based on the statistical measurement of physiological characteristics. In this sense, biometrics is the science of using a particular biological aspect of the human body to recognize a person for security, attendance, or any other purposes for which proof of identity is required. A buzzword right now, biometric identification actually has been around for a while. The most widely used biometric is fingerprints. But technological developments over the last decade have added DNA matching; iris and retinal scans; voice, handwriting, or facial recognition; and hand and facial geometry to the list of biometric identifiers."