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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">cheb</journal-id><journal-title-group><journal-title xml:lang="ru">Чебышевский сборник</journal-title><trans-title-group xml:lang="en"><trans-title>Chebyshevskii Sbornik</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2226-8383</issn><publisher><publisher-name>Tula State Lev Tolstoy  Pedagogical University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.22405/2226-8383-2021-22-5-391-399</article-id><article-id custom-type="elpub" pub-id-type="custom">cheb-1182</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>Краткие сообщения</subject></subj-group></article-categories><title-group><article-title>Скрытые марковские модели в задаче обнаружения атак на компьютерные сети</article-title><trans-title-group xml:lang="en"><trans-title>Hidden markov models in the problem of detecting attacks on computer networks</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Токарев</surname><given-names>Вячеслав Леонидович</given-names></name><name name-style="western" xml:lang="en"><surname>Tokarev</surname><given-names>Vyacheslav Leonidovich</given-names></name></name-alternatives><bio xml:lang="ru"><p>доктор технических наук, профессор</p></bio><bio xml:lang="en"><p>doctor of technical sciences, professor</p></bio><email xlink:type="simple">tokarev22@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Тульский государственный университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Tula State University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2021</year></pub-date><pub-date pub-type="epub"><day>18</day><month>01</month><year>2022</year></pub-date><volume>22</volume><issue>5</issue><fpage>391</fpage><lpage>399</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Токарев В.Л., 2021</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="ru">Токарев В.Л.</copyright-holder><copyright-holder xml:lang="en">Tokarev V.L.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://www.chebsbornik.ru/jour/article/view/1182">https://www.chebsbornik.ru/jour/article/view/1182</self-uri><abstract><p>В статье рассматривается задача обнаружения атак на компьютерные сети. Предлагается метод проактивного противодействия, основанный на использовании детекторов,выстраиваемых в виде скрытых марковских моделей.</p></abstract><trans-abstract xml:lang="en"><p>The article deals with the problem of detecting attacks on computer networks. A method of proactive counteraction based on the use of detectors built in the form of hidden Markov models is proposed.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>Математические модели</kwd><kwd>информационная безопасность.</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Mathematical models</kwd><kwd>information security.</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Bazrafshan, Z., Hashemi, H., Fard, S.M.H. and Hamzeh, A. (2013) A Survey on Heuristic Malware Detection Techniques. 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