The thesis deals with the protection of personal data in enterprises in the Czech Republic and Ukraine. The aim of this work is to study in detail the concept of personal data, the protection of these data, and to analyze whether there are differences in their protection in the Czech Republic and Ukraine.The first part describes the concept of information, its properties, and types. Legal protection of information in the Czech Republic and Ukraine is also discussed. At the end of this section, information threats, information leakage channels, and major protection methods are described.The second part deals with the concept of personal data and their main characteristics. The following describes the processing and protection of personal dat...