Mathematical Model of Noise Interference for Information Protection Against Software Leakage by Technical Channels
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MATHEMATICAL MODEL OF NOISE INTERFERENCE FOR INFORMATION PROTECTION AGAINST SOFTWARE LEAKAGE BY TECHNICAL CHANNELS
S. A. Ivanchenko
UDC 621.39:623.624+623.77
Abstract. The author substantiates the mathematical model of noise interference that takes into account statistical relation of readout samples for secure information protection against software leakage by technical channels. The model amends the mathematical expectation and root-mean-square deviation, which shifts the midpoint of noise interference and determines its effective capacity. Keywords: noise, noise interference, mathematical model, secure information protection, information leakage, technical channels of leakage.
INTRODUCTION Providing information security to a state is one of the most important problems [1]. With respect to the use of information and telecommunication systems, it is to balance the applied tools and methods of protection against effective threats. Depending on security criteria and required security level, special features of objects that form the information environment, cost and importance of the information being processed, as well as permanently improved and increasing capabilities of infringer, solutions of this problem can have different scientific directions and complexities. The problem of information protection against leakage by technical channels is currently solved by satisfying certain qualitative requirements and quantitative norms. To provide secure protection with admissible security risks [2], these norms should obviously be mathematically proved and justified in appropriate way. It is also obvious that this substantiation should be carried out with respect to effective conditions specified by the modern level of the global development of science and engineering. Information leakage by technical channels results from side effects, which occur during the operation of information handling and transmission facilities [3, 4] and propagate in the physical environment for long distances. Processes of information transmission through a channel are described in detail in theories of information, signals, potential noise immunity, as well as statistical theory of signal demodulation and other theories that form the general communication theory [5]. However, as to leakage channels, there is no need to provide the best information transmission like for communication channels. In view of leakage channels security, it is necessary to provide conditions whereby information transition from the source to the receiver is impossible. Therefore, applying the general communication theory to solve problems on preventing information leakage is insufficient and requires revising its provisions with clarification and renewal of generally accepted assumptions and constraints.
Institute of Special Communication and Information Security, National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute,” Kyiv, Ukraine, [email protected]. Translated from Kibernetika i Sistemnyi Analiz, No. 2, March–April, 2017, pp. 74–82.
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