Discrete and Continuous Models and Applied Computational ScienceDiscrete and Continuous Models and Applied Computational Science2658-46702658-7149Peoples' Friendship University of Russia named after Patrice Lumumba (RUDN University)8681Data Access Control Via Virtual External ModelPetrovV AКафедра информационных технологий; Российский Университет Дружбы Народов; Peoples Friendship University of Russiavladimirap@yandex.ruDolinaO DКафедра информационных технологий; Российский Университет Дружбы Народов; Peoples Friendship University of Russiaodolina@gmail.comTolmachevI LКафедра информационных технологий; Российский Университет Дружбы Народов; Peoples Friendship University of Russiatolmachevil@mail.ruPeoples Friendship University of Russia15032011310411108092016Copyright © 2011,2011The article discusses the problem of organizing different levels of access to data within information systems. These are based on a relational database designed to automate the management of the enterprise. Here we introduce the necessary definitions and concepts to build a model that allows us to make the mechanism of restricting access to data at the level of the relational model.data access controlaccess rights in information systemsaccess rights in relational databasevirtual external modelуправление доступом к даннымразграничение прав доступа в информационных системахправа доступа в реляционных базах данныхвиртуальная внешняя модель