Abstract
It is determined that the stable operation of critical infrastructure depends on the reliability and continuity of software for the protection of information resources. Failure to operate a certain software leads to significant economic losses. Assessments of software protection reliability include measurements of such characteristics as completeness and resistance to defects. The technique of comparison of software of protection of the information on criteria of quality and reliability is presented. This technique will allow the organizations without essential expenses and specialized knowledge at employees, to prepare a configuration for safe storage, processing and information transfer in own information system.