In the country, various information resources of the personal data distributed by destination, time and space are functioning and new resources are created. There is a necessity of coordination of the data for extraction of personal data, concerning to same person, from the distributed resources by a principle of a uniform window and in online mode during the services rendered to the population in state, public and the business sectors. For this purpose formation of a segment of the personal data in national information field is provided. In this paper the essence of the personal data, specificity of their protection, the factors influencing their life cycle, the legal environment regulating this area is investigated, and a number of crucial problems are identified. (p. 56-68)