Contemporary digital age proposes different opportunities in the public, social, private, and business areas based on remote access to distributed resources placed in virtual, cloud, educational, governmental, business, smart, and so forth environments. In this reason, the e‐governance is realized on the basis of digital communications between different parties that requires strong protection of the information resources and personal data. The digital sustainability is an important task for e‐governance in the digital world. Article deals with principles of correct protection of the information resources (including in the cloud) by using strong procedures for access regulation of the external clients. Organization of Information Security Management System for identification, registration, authentication, and authorization of the requests is discussed. An investigation of the proposed functionality is made on the basis of stochastic analytical modelling by using the apparatus of Markov chains and statistical processing and interpretation of the obtained results.