SUMMARY
The article is devoted to the development of the architecture of computing systems with multilevel access control to web services over public networks. Information technologies are becoming global and cross-border which leads them to become an integral part of all spheres of activity of an individual, society and state. Their effective application is a factor in accelerating the economic development of the state and the formation of an information society. At the same time, the rapid scientific and technological progress and the constant improvement of software and hardware require, on the one hand, the same constant improvement and increase in the efficiency of the functioning of all components, in terms of reducing costs, improving quality, reliability, safety, but at the same time providing a high level security of access to computing resources, without violating the requirements of existing laws to protect personal and confidential data. Taking into account the ever-increasing requirements for information infrastructure, the development of a computing complex architecture with various access control mechanisms that can expand the capabilities of information security tools is a very urgent task. Despite the fact that modern systems have a wide range of mechanisms and means of protecting information, they are clearly not enough, taking into account constant hacks and information leaks, therefore it is necessary to determine their role and place in each level of computing architecture. The paper proposes the architecture of a data processing system of a computing complex, with the described components serving to ensure access control. Also presented are the levels of data access when components access the computing complex, with a detailed description of the functioning and filling of modules. The results of experimental studies for assessing resource costs when tracking all the user actions are presented.