This article presents a review of the investigation of the possibility of increasing the efficiency of existing line test solutions for troubleshooting testing for IPTV over xDSL, by the results of experimental research on real system under commercial exploitation. At the beginning of this article the main weaknesses of the existing troubleshooting testing are described. In the continuation of the article the physical layer parameters of xDSL transceiver are listed. In the reset this article provides a few specific examples of xDSL lines with their physical layer parameters of xDSL transceivers followed by analysis how they can be used for the purposes of more efficient measurement of parameters of copper pairs.

This paper proposes metrics based on QoS preferences of MNs, and QoS abilities of MAPs, in order to perform a simulative evaluation of the Hierarchical Mobile IPv6 (HMIPv6) network implementation with QoS-aware dynamic MAP selection. The chosen metric meets the desired level of QoS, while retaining MAP load balance, while the DiffServ mechanism ensured the required QoS for HMIPv6 network implementation with QoS-aware dynamic MAP selection.

In spite of all efforts within the IPTV system to implement robust protection mechanisms, attackers manage to find a way to retransmit content to users who do not have right on it so they damage service providers for certain part of the their legal incomes. This paper presents practical examples of abuse of IPTV content. Several scenarios are created, which are based on the fact that subscribers of IPTV service perform abuse of content in a way that they illegally retransmit content which they have paid for or that they illegally record some content. Examples are derived from the author's experience of working on a real IPTV system, security threats and abuse that he is encountered by. Some recommendations are also given, that should be followed by administrators during the establishment of the IPTV system, which decrease potential risks of abuse.

Smart Grid (SG) communication become very hot topic for smart, intelligent and distributed transmission systems for electric power. However, security issues are still open and this is one of main concerns to the deployment of SG. In order to cope with this challenging concern, we propose secure message exchange protocol in this paper, for secure communication in SG system. Particularly, in the proposed protocol, we pay attention to robustness and resistance of exchanged messages to external noise, with a certain level of self-correction. Robustness and resistance to external noise is due to Quick Response (QR) code properties.