Study of strategies for real-time supervision of industrial network security S. TAMY (1) , N. RABBAH (2) , M. A. RABBAH (1) , M. RIFI (1) , H. BELHADAOUI (1) (1) RITM Laboratory, ESTC, Hassan II University, BP. 8012, Casablanca, Morocco (2) Laboratory of Structural Engineering, Intelligent Systems and Electrical Energy, ENSAM, Hassan II University, BP. 20000, Casablanca, Morocco saratamy@yahoo.fr Abstract— The three industrial revolutions of the past were all started off by many technical innovations: the using of water and steam powered mechanical manufacturing at the end of the 18th century, the division of labor at the beginning of the 20th century and introduction of programmable logic controllers (PLC) for automation purposes in manufacturing in the 1970s [1]. According to experts from industry and research, the upcoming industrial revolution will be triggered by the Internet, which allows communication between humans as well as machines in Cyber-Physical-Systems (CPS) throughout large networks [2]. Before the industry 4.0, the industrial network had problems of safety, but today, with the fourth revolution of the industrial network, it is necessary to guarantee constraints in terms of response time, to protect the continuity of the internet connection, especially in the event of an emergency shutdown of a machine. Without forgetting the security of the classic protocols (such as Profinet and Modbus) and the remote management protocols. The objective of this paper is to study the problems of industry 4.0 and compare the approaches or the proposed solutions, and afterwards propose some general orientations of search. Keywords—industry 4.0; Cyber-Physical System; SCADA; UTM; IDS; Human Machine Interface I. INTRODUCTION In a typical management network, the essential elements for the company's performance are confidentiality and integrity, while in an industrial network, what matters is availability and safety. The local industrial network lacks security, many incidents in industrial systems occur each year, such as the spread of the Stuxnet in 2010. Today, with industry 4.0, also called factory of the future or fourth industrial revolution, architecture has fundamentally changed. It is based on intelligent automation and integrates new technologies. So, industry 4.0 allows the transition from a centralized production to a decentralized production, while integrating IoT, data and services. Despite the advantages of this revolution, there are also challenges that will be presented in this paper. This paper is organized as follows: section II presents the evolution of industrial network architecture. Related works is discussed in section III, section IV presents problematic (security problems and problems related to real time and determinism), Unified threat management is also discussed in this section, and the classical approaches have been compared. Finally, section V presents the conclusion of the research work and proposition of future work. II. EVOLUTION OF INDUSTRIAL NETWORK ARCHITECTURE Before talking about the fourth revolution, Fig.1 shows a reminder of the previous ones: Fig. 1. Evolution of industrial network architecture