Smart Grid Security: Survey and Challenges Smart grids connect millions of devices and enable efficient power distribution. The biggest advantage of smart grid networks is their use in the distribution of renewable energy. In addition to the significant benefits that smart grids bring, it is necessary to address the issue of cyber security, which is all the more important as energy networks are a part of critical infrastructures. This paper discusses communication protocols used in smart grid networks. It focuses on the most widely used protocol: DLMS  COSEM. The paper deals with the security mechanisms, authentication methods, encryption, and logic and volumetric attack resistance. Furthermore, this paper deals with the security levels of smart meters and concentrators. It also presents currently available DLMS clients and explains the necessity of developing own DLMS client. The aim of this paper is to identify the problems of smart grid networks and to outline future solutions in this area.

FDIPP: False Data Injection Prevention Protocol for Smart Grid Distribution Systems In this paper, a false data injection prevention protocol (FDIPP) for smart grid distribution systems is proposed. The protocol is designed to work over a novel hierarchical communication network architecture that matches the distribution system hierarchy and its vast number of entities. The proposed protocol guarantees both system and data integrity via preventing packet injection, duplication, alteration, and rogue node access. Therefore, it prevents service disruption or damaging power network assets due to drawing the wrong conclusions about the current operating status of the power grid. Moreover, the impact of the FDIPP protocol on communication network performance is studied using intensive computer simulations. The simulation study shows that the proposed communication architecture is scalable and meets the packet delay requirements of intersubstation communication as mandated by IEC 61850901 with a minimal packet loss while the security overhead of FDIPP is taken into account.