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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">tuzsut</journal-id><journal-title-group><journal-title xml:lang="ru">Труды учебных заведений связи</journal-title><trans-title-group xml:lang="en"><trans-title>Proceedings of Telecommunication Universities</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1813-324X</issn><issn pub-type="epub">2712-8830</issn><publisher><publisher-name>СПбГУТ</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.31854/1813-324X-2022-8-3-117-126</article-id><article-id custom-type="elpub" pub-id-type="custom">tuzsut-403</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>ИНФОРМАЦИОННЫЕ ТЕХНОЛОГИИ И ТЕЛЕКОММУНИКАЦИИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>INFORMATION TECHNOLOGIES AND TELECOMMUNICATION</subject></subj-group></article-categories><title-group><article-title>Модификация алгоритма обнаружения  сетевых атак методом фиксации скачков фрактальной размерности в режиме online</article-title><trans-title-group xml:lang="en"><trans-title>Modified Algorithm for Detecting Network Attacks  Using the Fractal Dimension Jump Estimation  Method in Online Mode</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7564-6744</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Шелухин</surname><given-names>О. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Sheluhin</surname><given-names>O.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Олег Иванович Шелухин, доктор технических наук, профессор, заведующий кафедрой «Информационная  безопасность»</p><p>Москва, 111024</p></bio><bio xml:lang="en"><p>Oleg Sheluhin</p><p>Moscow, 111024</p></bio><email xlink:type="simple">sheluhin@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-4593-9009</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Рыбаков</surname><given-names>С. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Rybakov</surname><given-names>S.</given-names></name></name-alternatives><bio xml:lang="ru"><p><ext-link xlink:href="https://orcid.org/0000-0002-4593-9009" ext-link-type="uri">С</ext-link>ергей Юрьевич Рыбаков, главный специалист НОЦ «Информационная безопасность»</p><p>Москва, 111024</p></bio><bio xml:lang="en"><p>Sergey Rybakov</p><p>Moscow, 111024</p></bio><email xlink:type="simple">svolkov97@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8729-6729</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ванюшина</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Vanyushina</surname><given-names>A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Анна Вячеславовна Ванюшина, кандидат технических наук, доцент кафедры «Информационная безопасность» </p><p>Москва, 111024</p></bio><bio xml:lang="en"><p>Anna Vanyushina</p><p>Moscow, 111024</p></bio><email xlink:type="simple">a.v.vaniushina@mtuci.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru">Московский технический университет связи и информатики<country>Россия</country></aff><aff xml:lang="en">Moscow Technical University of Communications and Informatics<country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>06</day><month>10</month><year>2022</year></pub-date><volume>8</volume><issue>3</issue><fpage>117</fpage><lpage>126</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Шелухин О.И., Рыбаков С.Ю., Ванюшина А.В., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Шелухин О.И., Рыбаков С.Ю., Ванюшина А.В.</copyright-holder><copyright-holder xml:lang="en">Sheluhin O., Rybakov S., Vanyushina A.</copyright-holder><license 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://tuzs.sut.ru/jour/article/view/403">https://tuzs.sut.ru/jour/article/view/403</self-uri><abstract><p>В работе рассматривается модификация алгоритма обнаружения аномалий в сетевом трафике при использовании текущих оценок скачка фрактальной размерности в режиме реального времени. Модификация алгоритма заключается в дополнительной пороговой обработке (трешолдинге) полученных оценок фрактальной размерности и последующей вторичной фильтрации. Показано, что фильтрация c применением процедуры трешолдинга позволяет повысить точность текущей оценки фрактальной размерности и увеличить достоверность обнаружения аномалии в сетевом трафике в режиме online. </p></abstract><trans-abstract xml:lang="en"><p>The paper considers a modification of the well-known algorithm for detecting anomalies in network traffic using a real-time fractal dimension jump estimation method. The modification uses real-time thresholding to provide additional filtering of the estimated fractal network traffic dimension. The accuracy of the current estimate of the fractal dimension and the reliability of anomaly detection in network traffic in online mode is improved by adding extra filtering to the algorithm. </p></trans-abstract><kwd-group xml:lang="ru"><kwd>показатель Херста</kwd><kwd>фрактальный анализ</kwd><kwd>фрактальный гауссовский шум</kwd><kwd>кратномасштабный анализ</kwd><kwd>трешолдинг</kwd><kwd>скользящее окно</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Hurst exponent</kwd><kwd>fractal analysis</kwd><kwd>fractal Gaussian noise</kwd><kwd>multiresolution analysis</kwd><kwd>thresholding</kwd><kwd>sliding window</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">Ahmed M., Mahmood A.N., Hu J. A survey of network anomaly detection techniques // Journal of Network and Computer Applications. 2016. Vol. 60. PP. 19‒31. 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