Cibersegurança em sistemas de automação em plantas de tratamento de água. / Cibersecurity in automation systems in water treatment plants.




Currently, information security is a constant concern of the several institutions and countries that use computing resources for communication and service offering purposes. Protection methods and countermeasures for traditional networks such as firewalls and intrusion detectors are known and ordinarily used. The same goes for control systems and data acquisition (Supervisory Control and Data Acquisition - SCADA). In the beginning, such systems were based on mainframes and closed architecture, i.e., dependent on manufacturers and consequently isolated from other systems. Nowadays, the SCADA systems converge more and more to platforms based on open systems, with its architecture strongly relied on connectivity; thus, it is usual the interconnection of such systems with the corporate network and, in some cases, with Internet itself. From this issue, and with the current technology development in the information security area, a methodology is proposed to implement automation systems in water treatment plants with an emphasis on security, and focused on industrial systems, using automation safety rules ISA 99. The purpose of this essay is, in brief, to study safety rules, methods and methodologies for industrial systems with a focus on water treatment, and to propose a methodology directed to the minimization of safety hazards. For that purpose, it is proposed the evaluation of three water treatment real scenarios so that it is possible to simulate criticality parameters identified in the flow chart and stages of the water treatment. Therefore, a scenario connected to PLC was developed, allowing the simulation of the behavior and the impacts, in addition to an event detector for the result analysis.


industrial network normas isa redes industriais scada scada security segurança standard isa

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