Aerospace Instrument-Making Annotation << Back A NEW APPROACH FOR MANAGING THE SYSTEM OF DIFFERENTIATION OF ACCESS TO INFORMATION IN INFORMATION SYSTEMS OF TRAINING V.V. Lavlinskiy, A.A. Zmeev, S.V. Belov Сurrently, the discretionary security policy does not cope with the frequent change of the trained contingent and the change of resources. In addition, in information systems of training, on the one hand, there is a need to provide resources to trainees, and, on the other hand, there is a need to differentiate access to special-purpose information. The purpose of the work is to search for a new approach for managing the system of access control to special-purpose information in information training systems under the conditions of the specifi ed time intervals for setting up the access control system. Methods: management of the system of differentiation of access to special-purpose information in information training systems based on the use of thin client technology. Results: a formal model of the violator of the information system of training for special-purpose information is developed, which is characterized by the ability to take into account the undefi ned parameters of the NSD to the hypervisor via virtual machines. Practical relevance: the proposed approach makes it possible to model the processes of NSD to the hypervisor through virtual machines based on thin client technology and the possibility of using new indicators for assessing the stability of the system of access control to the NSD when using thin client technology. Keywords: mathematical model, simulation model, thin client technology, access control system, hypervisor, virtual machine, training information system, special purpose information. DOI: 10.25791/aviakosmos.6.2021.1224 Pp. 30-37.