To solve the problem of forgery, special sensors in Smartpen measure how a person writes his or her signature, including the force applied to the paper, the acceleration of the pen and the angle at which it is held. IriScan Inc. uses the iris, the colored portion of the eye, to identify individuals. Everyone's iris is unique, and a person's left and right irises are not even similar. IriScan's authentication system creates a mathematical code derived from the iris' unique patterns. Unlike other companies use of biometric iris readers, the IriScan system is noninvasive.
Nothing is aimed into the eye.
IriScan can scan an individual's iris even if the person is wearing glasses.