Nowadays the work efficiency and proficiency of public and private sector substantially depend on information technologies. In connection with the large volume of information stored in automated systems throughout the public sector, special attention should be paid to information security and security of actives. The main goals and tasks of information security, frameworks of IT security system are defined and analyzed in the paper; the standard of IT security system development is investigated, as well as international standards significance and guidance application within the development of IT security system. On the bases of research, the features of the State institutions are defined, which are necessary to take into consideration during the development of IT security system. The primary tasks of IT security system development are emphasized and the technique of development of IT security systems for State institutions is worked out.