Basic principles of secure information systems

The relevance of the work lies in the fact that the pace of development of the field of information security does not correspond to progress in the development of data processing methods, resulting in a serious lack of practical knowledge of the subject area, which prevents the creation of conditions for secure recording, processing and storage of data. In the process of writing the article, modern methods and principles of ensuring information security, including a mandatory approach, were studied, and a brief description of software products supporting this approach was given. The mandatory method of information protection implies granting access rights to certain actions in accordance with the user’s status. Such actions can be, for example, writing, reading and changing data. Examples of user statuses are ‘administrator’ and ‘reader’, where the administrator, as a rule, is provided with the entire list of available actions, and the reader is provided with only a minimum, sufficient for familiarization activities. In its architecture, the mandatory approach often contains tools for conducting cluster analysis. Cluster analysis can be used both to carry out work on risk analysis and assessment, and to determine the degree of protection of an object. In any case, when building a cluster, it should be taken into account that some levels of protection may be represented by more objects than others. There are software products on the information security market that allow the use of a mandatory method of ensuring information security. One of the striking examples is the PostgreSQL database management system, which has an apparatus of labels assigned according to the user’s level of rights: the higher the level of rights, the higher the access level.