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Application of visual cryptography for learning in optics and photonics
Author(s): Avikarsha Mandal; Peter Wozniak; Oliver Vauderwange; Dan Curticapean
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Paper Abstract

In the age data digitalization, important applications of optics and photonics based sensors and technology lie in the field of biometrics and image processing. Protecting user data in a safe and secure way is an essential task in this area. However, traditional cryptographic protocols rely heavily on computer aided computation. Secure protocols which rely only on human interactions are usually simpler to understand. In many scenarios development of such protocols are also important for ease of implementation and deployment. Visual cryptography (VC) is an encryption technique on images (or text) in which decryption is done by human visual system. In this technique, an image is encrypted into number of pieces (known as shares). When the printed shares are physically superimposed together, the image can be decrypted with human vision. Modern digital watermarking technologies can be combined with VC for image copyright protection where the shares can be watermarks (small identification) embedded in the image. Similarly, VC can be used for improving security of biometric authentication. This paper presents about design and implementation of a practical laboratory experiment based on the concept of VC for a course in media engineering. Specifically, our contribution deals with integration of VC in different schemes for applications like digital watermarking and biometric authentication in the field of optics and photonics. We describe theoretical concepts and propose our infrastructure for the experiment. Finally, we will evaluate the learning outcome of the experiment, performed by the students.

Paper Details

Date Published: 27 September 2016
PDF: 8 pages
Proc. SPIE 9946, Optics Education and Outreach IV, 99460X (27 September 2016); doi: 10.1117/12.2237923
Show Author Affiliations
Avikarsha Mandal, Offenburg Univ. (Germany)
Peter Wozniak, Offenburg Univ. (Germany)
Oliver Vauderwange, Offenburg Univ. (Germany)
Dan Curticapean, Offenburg Univ. (Germany)


Published in SPIE Proceedings Vol. 9946:
Optics Education and Outreach IV
G. Groot Gregory, Editor(s)

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