Author, institution: Vilma Petrauskienė, Kaunas University of Technology
Science area, field: Technological Sciences, Mechanical Engineering
The Doctoral Dissertation is available at the library of Kaunas University of Technology (K. Donelaičio St. 20, Kaunas).
Scientific supervisor:
Prof. Dr. Habil. Minvydas Kazys RAGULSKIS (Kaunas University of Technology, Technological Sciences, Mechanical Engineering – 09T).
Dissertation Defense Board of Mechanical Engineering Science Field:
Prof. Dr. Habil. Vytautas OSTAŠEVIČIUS (Kaunas University of Technology, Technological Sciences, Mechanical Engineering – 09T) – chairman;
Prof. Dr. Rimvydas GAIDYS (Kaunas University of Technology, Technological Sciences, Mechanical Engineering – 09T);
Prof. Dr. Vytenis JANKAUSKAS (Aleksandras Stulginskis University, Technological Sciences, Mechanical Engineering – 09T);
Assoc. Prof. Dr. Giedrius JANUŠAS (Kaunas University of Technology, Technological Sciences, Mechanical Engineering – 09T);
Prof. Dr. Habil. Genadijus KULVIETIS (Vilnius Gediminas Technical University, Technological Sciences, Mechanical Engineering – 09T);
Prof. Dr. Habil. Arvydas PALEVIČIUS (Kaunas University of Technology, Technological Sciences, Mechanical Engineering – 09T).
Annotation:
Dynamic visual cryptography is an alternative image hiding technique based on time-averaging moiré. This dynamic visual cryptography scheme requires a computer to encode a secret, but one can decode the secret without a computing device. Only one picture is generated, and the secret is leaked from this picture when parameters of the oscillation are appropriately tuned. In this dissertation, the optimal time function has been found that allows ensuring optimal security of encoded image. It has been shown that the optical effects of dynamic visual cryptography can be realized by using experimental devices generating oscillations and using appropriate control techniques. The possibilities for experimental implementation of chaotic dynamic cryptography have been analyzed. Optical effects on the screens of digital computers are employed for the implementation of dynamic visual cryptography what has enabled the evaluation of the functionality of human vision system.
