Preface

Abstract

The scope of interests of modern telecommunications is ranging from issues of transmission, in both wireless and wired, mostly optical systems, through networking architectures with protocol issues associated with the exchange of information between end systems and networking components, including protection of communications against an unauthorized access, and on the problems of network services and applications ending. In all these areas, we are able to identify a number of current hot topics attracting researchers and practitioners. The current issue of Telecommunications and Information Technology covers almost all these essential subjects. Bartosz Czaplewski, Mariusz Dzwonkowski, and Roman Rykaczewski in Digital fingerprinting based on quaternion encryption scheme for gray-tone images present their research results in the area of digital fingerprinting of images. In particular, they propose a new scheme that is based on quaternion encryption in the Cipher Block Chaining mode. Although the algorithm presented in this paper was originally designed for gray-tone images, it can be also adapted for color images. In order to validate the proposed approach, in the latter part of the paper the authors performed the computer-based simulations, as well as included a detailed analysis of obtained results. (...)