Development of Software and Hardware to Protect Technological Processes from Cyber Threats

The rapid development of technological computer networks (TCNs) and SCADA systems has inevitably accelerated the integration process between these networks and the global Internet. As a result, the solution of many problems of technological and production processes has been simplified, and opportunities have been created for remote management of enterprise personnel and operational personnel. However, this situation has created new, previously nonexistent threats to monitoring, diagnostics, and control systems. Various specialized groups, hackers, and sometimes government agencies carry out targeted attacks on specific industrial enterprises via the Internet. Organizers of cyberattacks on process control systems improve their methods and tools over time and increase their professional level. They carefully study the objects of their future attacks and identify vulnerabilities in the software of object control systems. The developed set of technical means is based on the use of STM32F4XX controllers and LPT ports of computers. Connection diagrams and installation methods for technical means are provided, which, as the created exchange protocols, can serve as a bridge between the global Internet and technological corporate computer networks. Simple algorithms and operating software fragments of the created protocols are presented. The program fragments are given in the C programming language and in the DELPHI programming system. The developed software acts as a filtering bridge between the global Internet and the technological corporate computer network. Information between the two networks is exchanged by using a nonstandard protocol using the STM32F4XX controller and LPT port.