The article presents the problem of modern threats to critical IT infrastructure in the power sector (ICS − Industrial Control Systems) and the current status of global solutions, norms, standards and procedures and shows typical control systems protection strategies employed in the power sector. The emergence of advanced cyber-attacks against power control and distribution systems indicates a growing possibility of military attacks and malware prepared as a new forms of offensive weapons. Taking into consideration the possibility of using advanced techniques in cyber-attacks, most of the existing, commercial protection systems may be insufficient. It is necessary for critical infrastructure in the power sector to isolate systems from the outside world, which in turn could be inconvenient because it limits the possibility of remote process observation. In addition, solutions for the secure data communication are constantly developed and evaluated and this article presents in detail a secure communication solution for acquiring data from industrial DCS automation systems (power generation).