Currently, information security is a constant concern for many institutions and countries that use computer resources for communication and to deliver services. For SCADA systems, the situation is no different. Taking this issue into account, and based on current technological development in the information security area, this research proposes a methodology to implement automation systems in water treatment plants, with an emphasis on security, and a focus on industrial systems that employ the ISA 99 automation safety standards. Additionally, an analysis and identification ...