Model for a quantitative estimation of information security from unauthorized access in the automation system on a complex metric

In this article the urgency of information security estimation problem from unauthorized access in the automation system is shown. The purpose of the article is working out a model for a quantitative estimation of information security from unauthorized access, which provide increasing efficiency management of information security in the organizations. For solution of the information security quantitative estimation task the complex metric is offered – security coefficient of the automation system. On the basis of the given metric the comparative analysis for the standard automation systems of firms is carried out, guidelines on rise of their level of security are resulted.