**Author details**

Nektarios Moumoutzis1,2\*, Desislava Paneva-Marinova1 and Lilia Pavlova<sup>3</sup>

1 Institute of Mathematics and Informatics, Bulgarian Academy of Sciences, Sofia, Bulgaria

2 Laboratory of Distributed Multimedia Information Systems and Applications, School of Electrical and Computer Engineering, Technical University of Crete, Crete, Greece

3 Laboratory of Telematics, Bulgarian Academy of Sciences, Sofia, Bulgaria

\*Address all correspondence to: nektar@ced.tuc.gr

© 2021 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/ by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
