News Academy of Engineering Sciences A.M. Prokhorov Annotation << Back The protection of information and the operation of the service integrity automated trade organization V.I. Sumin I.A. Gubin This article deals with the modern approach to the design of security systems (GIS). In particular with regard to information system (IS) of the trade organization. Partially reveals the essence of the reference model secure automated system (RMPAS) as a method of constructing the IP so as to eliminate security threats that have a basis in the very errors of systemic structure. Given layout IS organization by levels RMPAS. A description of the service integrity (CC) as a key part of GIS. Attention is paid to the efficiency of the CC: is a number of different criteria, which are mapped to mathematical elements. KC seen as a complex system, which has a chain of states with probabilistic transitions. Conclusions based on the data it is concluded that the most convenient mathematical tool to analyze the stochastic model is the theory of finite semi-Markov processes. Keywords article: Automatic data processing system; aggressiveness functioning; discretionary access; protection of information; the information system; the final semi-Markov process; integrity control; unauthorized access; stochastic process; trade organization. Contacts: Е-mail: viktorsumin51@yandex.ru Pp. 12-18.