Abstract
This article presents a solution that strengthens information security in critical infrastructure entities. Critical infrastructure plays a key role in the functioning of the state and the life of its citizens. Therefore, the protection of critical infrastructure is one of priorities in Poland. The aim of this article is to show that designated postal operators may become an important link in the process of information flow and cybersecurity. Based on their multiple-year experience and expended competences, the operators may provide digital services for entities responsible for the energy security infrastructure. Verification of this goal is necessary, since critical infrastructure is exposed to growing threats, both in the area of energy and other sensitive sectors of the economy. Research results presented in the article were obtained by conducting a CATI survey. The study used the purposeful selection method, which allows to influence the structure of a sample in the context of goals set by the authors. The method solicited key information from experts on postal and energy markets. The results constitute a new approach to the role of the designated postal operator. The authors analysed possibilities to support entities that secure critical infrastructure, including those from the energy sector. It shows that the role of the designated postal operator may significantly change. Taking into account the security of information and cybersecurity, the postal operator could expand its competences, secure infrastructure-related information flow, and thus become a key pillar of the state.