Biblio

The paper considers the issue of assessing threats to information security in industrial automation and telecommunication systems in order to improve the efficiency of their security systems. A method for determining a quantitative indicator of threats is proposed, taking into account the probabilistic nature of the process of implementing negative impacts on objects of both industrial and telecommunications systems. The factors that contribute and (or) initiate them are also determined, the dependences of the formal definition of the quantitative indicator of threats are obtained. Methods for a quantitative threat assessment as well as the degree of this threat are presented in the form of a mathematical model in order to substantiate and describe the method for determining a threat to industrial automation systems. Recommendations necessary for obtaining expert assessments of negative impacts on the informatisation objects and information security systems counteracting are formulated to facilitate making decisions on the protection of industrial and telecommunication systems.

This article presents the modeling results of the ability to improve the accuracy of predicting the state of information security in the space of parameters of its threats. Information security of the protected object is considered as a dynamic system. Security threats to the protected object are used as the security system parameters most qualitatively and fully describing its behavior. The number of threats considered determines the dimension of the security state space. Based on the dynamic properties of changes in information security threats, the space region of the security system possible position at the moments of subsequent measurements of its state (a comprehensive security audit) is predicted. The corrected state of the information security system is considered to be the intersection of the area of subsequent measurement of the state of the system (integrated security audit) with the previously predicted area of the parameter space. Such a way to increase the accuracy of determining the state of a dynamic system in the space of its parameters can be called dynamic recurrent correction method. It is possible to use this method if the comprehensive security audit frequency is significantly higher than the frequency of monitoring changes in the dynamics of specific threats to information security. In addition, the data of the audit results and the errors of their receipt must be statistically independent with the results of monitoring changes in the dynamics of specific threats to information security. Improving the accuracy of the state of information security assessment in the space of the parameters of its threats can be used for various applications, including clarification of the communication channels characteristics, increasing the availability and efficiency of the telecommunications network, if it is an object of protection.

This paper describes research results of the possibility of developing a methodology to implement systematic knowledge about adversaries` tactics and techniques into the process of determining requirements for information security system and evaluating defensive countermeasures.

The government in the era of big data requires safer infrastructure, information storage and data application. As a result, security threats will be the bottleneck for e-government development. Based on the e-government hierarchy model, this thesis focuses on such information security threats as human effects, network technology defects and management deficiency facing the e-government system in the era of big data. On this basis, three solutions are put forward to improve e-government information security system. Firstly, enhance information security awareness and improve network technology of information management departments in the government; secondly, conduct proper information encryption by ensuring information confidentiality and identity authentication; thirdly, implement strict information management through isolation between intranet and extranet and united planning of e-government information management.

The authors carry out the analysis of the process of modeling threats to information security of automated process control systems. Basic principles of security threats model formation are considered. The approach to protection of automated process control systems based on the Shtakelberg game in a strategic form was modeled. An abstract mathematical model of information security threats to automated process control systems was developed. A formalized representation of a threat model is described, taking into account an intruder's potential. Presentation of the process of applying the described threat model in the form of a continuous Deming-Shewhart cycle is proposed.

The constant changing of technologies have brought to critical infrastructure organisations numerous information security threats such as insider threat. Critical infrastructure organisations have difficulties to early detect and capture the possible vital signs of insider threats due sometimes to lack of effective methodologies or frameworks. It is from this viewpoint that, this paper proposes a symptomatic insider threat risk assessments framework known as Insider Threat Framework for Namibia Critical Infrastructure Organization (ITFNACIO), aimed to predict the probable signs of insider threat based on Symptomatic Analysis (SA), and develop a prototype as a proof of concept. A case study was successfully used to validate and implement the proposed framework; hence, qualitative methodology was employed throughout the whole research process where two (2) insider threats were captured. The proposed insider threat framework can be further developed in multiple cases and a more automated system able to trigger an early warning system of possible insider threat events.

Timely prevention information security threats, provided by specialized software and hardware, is the effective business foundation, allowing to reduce reputational and financial risks for the company. At the same time, protection must be implemented in all detractors' possible attacks areas. If we turn to the Russian Federation leISSlation, then the FSTEC order No31 of March 14, 2014 may be adopted as the basis for ``isolating'' the protection vectors, according to which the basic measures for protection should be provided at the following levels: access subjects identification and authentication, access delineation, software restriction, computer storage media protection, etc. (There are 21 of them). On the hardware and software complex basis that implement protection at each of these levels, an enterprise information security system is created. To select the most appropriate software and hardware information security, and, therefore, to build an optimal enterprise information protection system, one can turn to graph theory. In this case, the problem is reduced to the ranked descending graph construction and the optimality problem solution, i.e. critical (maximal) path of this graph calculation. Each graph level corresponds to a specific subsystem of the information security system, while the subsystems are located in the alleged overcoming order protection by the attacker; tops - the considered information security tools; the graph is weighted, the each its arcs weight corresponds to the expert evaluation of the preference for using a particular tool.