Railway companies, in accordance with their vision and mission, have the basic task of traffic management as well as the transportation of users and goods. In order to regularly carry out business tasks, railway companies increasingly apply the available systems and technologies of electronic business. Basically, electronic business enables the modern implementation of business activities through digital channels. Today, traditional business models are being completely replaced by innovative digital models based on a large percentage of the use of computer systems in both companies and individuals in their homes. This innovative electronic business system requires the protection and security of all participants in digital communication processes. This paper presents cyber security mechanisms that can be applied by railway companies in business. The main goal is a comparative analysis of the protection mechanism, which includes the components of traditional protection systems that are already in place, up to modern ones that include the application of blockchain technology.