Sulima O. Methods of access security organizing to information systems based on multilevel models

The dissertation is devoted to the development of methods for building an empowerment system for the use of confidential data contained in the information system. The empowerment system is an important component of the information system access security system. Therefore, the paper examines the methods of building a system for granting authority that provides a certain level of security access to confidential data, which are closely related to the degree of confidentiality of relevant data contained in the information system. The method of implementation of the empowerment system, based on the two-level model of empowerment, was developed and investigated in the work. Since the data contained in the information system is required to solve applied problems, the first level examines the task of granting access to the system to the user who has to solve an application task. At the second level, the system grants the authority to an applied problem, which needs to be solved and requires for that, apart from other data, confidential data with a certain level of confidentiality. The task of granting authority to applied problems is solved on the basis of analysis of task parameters and, at the same time, the user parameters are not taken into account. Obviously, the required parameters of the applied task are given to the information system by the user, who has gained the access to the system.