Hierarchical stochastic model for monitoring of treat to information security of information system

Nowadays modern information systems solve various problems concerned with automation of banks, insurance and trading company activities, financial exchanges, supervisory control and data acquisition applications etc. They become more complex due to widening of their applicability that requires protection for both loose units or modules and whole system. Therefore the problems of corporate information resources security providing take on a dimension during all steps of system design and maintenance. This work considers a stochastic model for monitoring of treat to information security of the whole information system. Proposed model provides analysis of various factors and threats influence on information system and its optimum operation mode under them. This developed technique is based on analysis of information security risks and designing of threat hierarchical stochastic model. We utilize the algorithm of directed search of information security risks, which performs security risk choice by maximal information capacity criterion. It provides decreasing of analyzing threats and therefore transmitted data capacity.