Photon-counting multifactor optical encryption and authentication

Optical encryption using photon-counting polarimetric imaging.

We present a polarimetric-based optical encoder for image encryption and verification. A system for generating random polarized vector keys based on a Mach-Zehnder configuration combined with translucent liquid crystal displays in each path of the interferometer is developed. Polarization information of the encrypted signal is retrieved by taking advantage of the information provided by the Sto...

Optical image encryption via photon-counting imaging and compressive sensing based ptychography

In this study, we investigate the integration of compressive sensing (CS) and photon-counting imaging (PCI) techniques with a ptychography-based optical image encryption system. Primarily, the plaintext real-valued image is optically encrypted and recorded via a classical ptychography technique. Further, the sparse-based representations of the original encrypted complex data can be produced by ...

Multifactor Biometric Sketch Authentication

In this paper we propose a multifactor biometric sketch authentication method based on biometric sketch recognition and a user’s personal knowledge about the sketch‘s content, which is negotiated between the biometric authentication system and the user during enrollment. The used sketch recognition algorithm is based on the active shape structural model (ASSM) for analyzing the structural varia...

Optical Security using the Double-Random-Phase Encryption with Photon-Counting

Multifactor Authentication for Software Protection

Software protection is a mechanism to make software systems more difficult (or impossible) to be accessed by attackers. Such mechanisms are gaining more importance nowadays for increasing number of attacks on the software systems in the large internet networked environment. Hence, in this paper, two schemes are proposed to achieve effective software protection tools. They are based on the use o...