Role of optics and photonics in encryption, anti-counterfeiting, and security systems

Abstract

Optics and photonics systems are used in developing optical techniques for image encryption, optical neural networks for face recognition, and other biometrics signature verification. The basic idea is to permanently and irretrievably bond a phase mask to a primary identification pattern such as fingerprint, a picture of a face, or a signature. These techniques employ complex phase/amplitude encoding that cannot be seen and cannot be copied by an intensity sensitive detector.