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Structured fuzzy cognitive model and its proposed methodology for determining the degree of harm the security of systems and services for security of information systems.

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Possibility to construct a mandatory security policy on the basis of known access differentiation rules is considered in this article.

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The necessity to timely detect malicious documents which cause malicious code execution on users' computers due to exploitation of vulnerabilities is very actual issue of information security. At this time this threat is actively used in order to arrange creating botnets, stealing personal assets of users and other criminal acts with the help of so-called exploit kits and the threat seems to be used in future as well. The paper’s focus is on the issues of static structural analysis of malicious PDF (Portable Document Format) files and development of approach to detect such files by using Data Mining techniques.

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The opportunity to model an intrusion into a computer system using the imbalance of the observation process is considered in this article. Well-known estimates of trusted bracket for the intrusion time contain parameters depended on type of distributions before and after intrusion. Taking into account the lack of such information it is recommended to use algorithms barely depended on the distribution character and to research the efficiency of intrusion estimate using experimental methods.

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In this paper we give an introduction to the digital audio watermarking (DWM) technology, a brief historical summary of DWM. The principle and the general scheme of embedding DWM are considered. The differences in the methods of implementing DWM and other steganography methods are described. DWM applications are given. А comparative analysis of audio signal integrity verification methods based on cryptography and DWM is carried out. The basic requirements for DWM and performance criteria embedding DWM are listed.

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Finding the key of symmetric cipher takes solving of polynomial equations. Complexity of solving process can be reduced if exact or approximate basis of ideal of substitution is defined by short polynomials. Accuracy of short basis can be increased using affine change of variables. Two methods for solving system of Boolean equations are proposed.

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The focus of the study is to analyze the main temporal, spectral, correlation, and other features and opportunities to apply complex discrete-manipulated signals (DMS) with discontinuous time structure in river automated identification systems (AIS).

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The paper reviews the problem of security provision for computing resources and user data in Grid systems. It discusses the security related characteristics of Grid system architecture and provides the threat model. It also considers the related methods aimed to improve security of Grid systems and discusses their disadvantages. There is proposed a Grid system specification based on Petri net which allow modeling of job requests distribution in accordance with the requirements of security policies and formulization of the objectives of Grid systems protection from unauthorized access.

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Use of cloud computing applications and services requires review and adaptation of existing formal models for computer security. It is necessary to consider the benefits of cloud deployment models and provide the procedure for allocating process among components of cloud computing environment for achieving confidentiality and data protection.

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Nowadays there is lack of efficiency evaluation methods, which will allow to compare efficiency of defense and intrusion tools, in particular, botnets. Set of efficiency evaluation metrics is proposed. These metrics take into consideration network nature of modern defense and intrusion tools and allow to obtain a numerical estimate for factors, significant for defense or intrusion efficiency. Therefore, these metrics allow to make a conclusion about result of the battle between networks of benign and malignant agents, and conclusion about local or global area network protection.

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Malware often aims at breaking confidentiality. In this paper the authors proposed an approach to the detection of unauthorized data transfer, produced by malicious software from client computer over the HTTP. This approach is based on detection of inconsistency between network traffic and user actions.

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The article deals with inter-departmental and inter-ministerial document flow protocol. Also there is investigation of implementation stage problems included. Main goal is to estimate these problems impact and to propose relevant solutions.

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Some aspects of protection of electronic flow of documents are investigated.

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The system of reaction on DOS-attacks with feedback are modeling.

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The paper reviews the problem of performance degradation in distributed systems of electronic services using cryptographic algorithms. It discusses a model of network traffic flows classification. Based on that model, the high-performance gateway for providing network traffic security in distributed systems of electronic services is proposed.

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The paper considers the peculiarities of systems implementing security information and event management technology (SIEM systems). Description of known implementations of such systems is given. We discuss the main features of the MASSIF project of Seven-Framework Program of European Community, which is devoted to investigation of new generation SIEM systems. Issues of two key tasks of this project associated with the analysis of security events, based on the modeling of network attacks, and building the security information repository are also discussed.

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The paper considers the approach to the interactive specification of the client-server protocols by the special language based on the formal model of network activity.

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In this work we present two new protocols for secure management of remote objects. These protocols are released in group of points of elliptic curve, defined over finite field, with usage of russian cryptography standards.

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Standard AES padding schemes could insert some regurality into random data. The exploiting of such vulnerability is shown in password verification algorithms of some applications. The use of random AES padding is proposed.

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The main problem of the automatic recognition of people's faces is the speed of the existing methods and algorithms. In this paper the authors propose a new method to increase the speed of face recognition by using fractal compression algorithms.

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In this article given proof of opportunity of using the chi-squared test with deviation from standard fixed model of independent observation. It is showed in the article, that with breaches of classical conditions using the test is brought to comparison of two large, but different values, opposite to standard hypothesizes, where large and medium values of statistics are compared.

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In this paper we propose the method for analyzing probabilistic attributes of computer system security class evaluation process according to the set of rules declared in common standards. Entire event group used in computer system security class determination is introduced. Probability calculation results of correct/incorrect estimation for given conditions are proposed.

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Based on the systematic approach developed using cryptographic mechanisms and block access to the file, allowing synergies to increase the reliability of the protection of information stored on your computer.

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This paper presents some experimental results of the research on the process of creation and renewal of file timestamps during common file operations in the NTFS file system. A thorough analysis of these results may be promising from the angle of information security and computer forensics.

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Nowadays systems of and network traffic analysis have to process large volumes of traffic, it requires substantial computing resources. Proposed model of high-speed parallel network traffic processing on a multiprocessor cluster mathematically describes processes of load-balancing on clusters, network traffic classification and evaluation of its characteristics, which allows to increase in efficiency of network traffic's data processing.

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Some results on cryptanalysis of Hidden Field Equations (HFE) cryptosystem over the odd-characteristic fields are presented. Using of odd-char HFE schemes reduces key generation, encryption and decryption time. Possible attacks are analyzed. Recommendations for HFE parameters choice are provided.

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The procedures eliminating possible ambiguity, inconsistency and discrepancy of data in the distributed automated systems of critical appointment are considered and are mathematically proved. The method and a technique of control and search of the duplicated data for relational model are described respectively. Application of potential key attributes for an assessment of identity of objects in the distributed information automated system is offered. Values of a resultant matrix of similarity of potential key attributes are thus used.

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An approach to differentiation of clusters belonging to jpeg files from other clusters on the digital media is described in the following work. The approach is based on building of signatures for former search in clusters in question. Possible applications of described method are discussed.

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