Modeling of the Estimation of the Time to Failure of the Information System for Critical Use

摘要

Considering the purpose of the information system for critical use (ISCU), the task of modeling the processes that accompany its functioning in a global cyberphysical space is relevant. However, the complexity of the modeling object encourages the projection of synthesized models onto the selected attribute of dependability as a complex qualitative characteristic of information system. The article proposes models for estimating time to failure (TTF) as a functional-temporal component of ISCU reliability, in which, unlike in the existing ones, serial and parallel versions for aggregating a cascade of autonomous security subsystems are taken into account, which allowed us to formalize resourceintensive optimization task for the ISCU, the information security subsystem of which is designed to provide a given TTF. To solve the optimization task, an adaptation of the corresponding methods of mathematical programming is proposed, the effectiveness of which is proved empirically.