Today, the management of railway traffic and transport is mainly based on the application of computer hardware and software components that are installed in the company's official premises. The application of information and communication technologies (ICT) includes all processes that take place in electronic business between employees, citizens, as well as between machines and devices, indirectly or directly. The improvement of business operations of companies with a tendency to grow and the application of digital infrastructure implies the use of protective mechanisms that prevent cyber attacks and threats. Cyber attacks in such complex business processes (the security of traffic regulation from dispatch centers and even to digital money transactions when buying a ticket or paying for the transportation of a shipment) can cause malicious activities from unknown attackers in order to redirect or modify messages. Basically, it is necessary to apply measures to protect connected computer systems, which include signaling, control, mutual communication and the safety of all traffic participants. This paper presents a model of protection, cyber security in the railway company, which implies the application of blockchain technology as today's most powerful mechanism for storing and memorizing data in digital processes.