Everyday life and business nowadays are not possible without the internet, cell phones and personal computers. Therefore, the protection of digital property and personal data is of increasing importance for legal and natural persons, given the growing risks and threats of cybercrime. Investing in information security does not represent a cost burden but guarantees the competitive advantage and survival of the organization in the market. The thesis explains the concept of Blockchain technology and the way in which it contributes to the preservation of information privacy and authenticity of digital data. Presented are the ways in which Blockchain technology works in digital business with analysis of legal regulations governing the data processing in information systems. The paper also defines the areas of information security and current risks and threats. The structure, application and future development of Blockchain technology are elaborated. At the end of the paper, a survey was carried out in the form of a poll related to the implementation of information security in data protection and the level of education of users about computer threats. The results of the research are processed and the conclusion of the diploma thesis is defined.