The topical scientific and applied problem concerning the development of methodological bases of information protection in social networks taking into account the influence on the protection of specific parameters of a network is solved in work. For the first time, the concept of comprehensive information protection in social networks was developed, which combines theoretical methods, techniques, models, and technological approaches to information protection in social networks. The concept is based on the assessment of the balance between the threats of information loss from specific parameters of the social network; on the mathematical model of feedback taking into account the size of the system, the amount of data and reliability; on the method of increasing the level of information security, taking into account the coefficients of trust, reputation, correlation, clustering, dissemination of information and network expansion. Implementation of the proposed concept allows to ensure the transition from organizational and technical to structural and organizational technology of information protection in social networks; For the first time, a mathematical model for assessing the stability of the information protection system in social networks was developed, which is based on the analysis of the parameters of the protection system behavior during and after external influences on the data protection system taking into account the dynamics of influence parameters. The model allows to carry out research of parameters of protection of system and to take necessary measures for improvement of the system of protection of the information taking into account nonlinear interaction of elements of system of protection and external influences; For the first time, a method of increasing the level of security of the information space of social networks was developed, which is based on the results of the analysis of the constructed phase portrait and the analysis of the transient processes of the information protection system. The technique allows to effectively investigate transients with the possibility of visualization of models (flowcharts) and research results, the improved mathematical model of information protection in the social network based on dynamic security characteristics of the system, which, unlike existing models, has feedback on such parameters, as, the size of the system, the amount of data and their reliability. Implementation of the advanced model allows to dynamically change the parameters of protection of network users depending on the intensity of attacks and a given level of information security; The mathematical model of the information protection system in social networks has been further developed, which, in contrast to the existing ones, takes into account network expansion, information dissemination parameter and correlation coefficient and allows an objective assessment of the balance between information security threats and specific social network parameters. turn, allows you to change the level of access to user information depending on the reputation of the environment; The mathematical model and methods of increasing the level of information security have been improved, which, in contrast to the existing ones, take into account the impact of specific parameters on the information protection system: trust, reputation, correlation and clustering coefficient of the network. The application of the model and methodology allows analyzing the impact on the information protection system of other situational parameters (the number of dyads, triads, communities).
