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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">sibsutis</journal-id><journal-title-group><journal-title xml:lang="ru">Вестник СибГУТИ</journal-title><trans-title-group xml:lang="en"><trans-title>The Herald of the Siberian State University of Telecommunications and Information Science</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1998-6920</issn><publisher><publisher-name>СибГУТИ</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">sibsutis-352</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>Статьи</subject></subj-group></article-categories><title-group><article-title>Применение статистического анализа 
для обнаружения скрытых сообщений 
в текстовых данных</article-title><trans-title-group xml:lang="en"><trans-title>Applying Statistical Methods for Secret Message Detection in Text Data</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>Нечта</surname><given-names>И. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Nechta</surname><given-names>I. V.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff xml:lang="ru" id="aff-1"><institution>СибГУТИ</institution><country>Russian Federation</country></aff><pub-date pub-type="collection"><year>2012</year></pub-date><pub-date pub-type="epub"><day>26</day><month>10</month><year>2022</year></pub-date><volume>0</volume><issue>1</issue><fpage>23</fpage><lpage>29</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Нечта И.В., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Нечта И.В.</copyright-holder><copyright-holder xml:lang="en">Nechta I.V.</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://vestnik.sibsutis.ru/jour/article/view/352">https://vestnik.sibsutis.ru/jour/article/view/352</self-uri><abstract><p>В данной статье предлагается улучшение предложенного ранее метода стегоанализа 
текстовых данных. Суть предыдущего метода состояла в том, что извлекаемое из текста 
сообщение проверялось на случайность при помощи статистического теста хи-квадрат. Случайность извлечённого сообщения означала наличие внедрения. В настоящей работе предлагается модифицировать тест хи-квадрат таким образом, чтобы используемый 
в тесте квантиль был подобран эмпирическим путём. Такая модификация уменьшает 
вероятность ошибки стегоанализа.</p></abstract><trans-abstract xml:lang="en"><p>In this paper we propose a method of improving the previous steganalysis. The essence of the original method was that extracted from the text secret message was tested randomness by using a chi-square test. The randomness of the extracted message meant that secret message was embedded. In this paper we propose a modified chi-square test so that the quartile used in the test was chosen empirically. This modification reduces the probability of steganalysis mistakes.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>стеганография</kwd><kwd>стегоанализ</kwd><kwd>стеготекст</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Tyrannosaurus Lex</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">Нечта И. В. Метод стегоанализа текстовых данных, основанный на использовании статистического анализа // Вестник СибГУТИ. 2011. №3. С. 27-34.</mixed-citation><mixed-citation xml:lang="en">Нечта И. В. Метод стегоанализа текстовых данных, основанный на использовании статистического анализа // Вестник СибГУТИ. 2011. №3. С. 27-34.</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Winstein K. Tyrannosaurus Lex 1999. // URL: http://alumni.imsa.edu/ ~keithw/tlex/ (дата обращения: 12.12.2009).</mixed-citation><mixed-citation xml:lang="en">Winstein K. Tyrannosaurus Lex 1999. // URL: http://alumni.imsa.edu/ ~keithw/tlex/ (дата обращения: 12.12.2009).</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">Taskiran C., Topkara U., Topkara M., Delp E. Attacks on Lexical Natural Language Steganography Systems // Proceedings of the SPIE International Conference on Security, Steganography, and Watermarking of Multimedia Contents VI. San Jose. 2006.</mixed-citation><mixed-citation xml:lang="en">Taskiran C., Topkara U., Topkara M., Delp E. Attacks on Lexical Natural Language Steganography Systems // Proceedings of the SPIE International Conference on Security, Steganography, and Watermarking of Multimedia Contents VI. San Jose. 2006.</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">Yu Z., Huang L., Chan Z., Li L., Zhao X., Zhu Y. Steganalysis of Synonym-Substitution Based Natural Language Watermarking // International Journal of Multimedia and Ubiquitous Engineering. Vol. 4, No. 2, April, 2009.</mixed-citation><mixed-citation xml:lang="en">Yu Z., Huang L., Chan Z., Li L., Zhao X., Zhu Y. Steganalysis of Synonym-Substitution Based Natural Language Watermarking // International Journal of Multimedia and Ubiquitous Engineering. Vol. 4, No. 2, April, 2009.</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">Chen Z., Huang L., Yang W. Detection of substitution-based linguistic steganography by relative frequency analysis // Digital investigation 2011. Vol. 8(1), Elsevier. pp. 68-77.</mixed-citation><mixed-citation xml:lang="en">Chen Z., Huang L., Yang W. Detection of substitution-based linguistic steganography by relative frequency analysis // Digital investigation 2011. Vol. 8(1), Elsevier. pp. 68-77.</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">Chang C., Lin C. Libsvm A library for support vector machines // URL: http://www.csie.ntu.edu.tw/~cjlin/libsvm/ (дата обращения: 12.12.2009).</mixed-citation><mixed-citation xml:lang="en">Chang C., Lin C. Libsvm A library for support vector machines // URL: http://www.csie.ntu.edu.tw/~cjlin/libsvm/ (дата обращения: 12.12.2009).</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">Gutenberg Project // URL: http://www.gutenberg.org/wiki/Main_Page (дата обращения: 13.06.2011).</mixed-citation><mixed-citation xml:lang="en">Gutenberg Project // URL: http://www.gutenberg.org/wiki/Main_Page (дата обращения: 13.06.2011).</mixed-citation></citation-alternatives></ref></ref-list><fn-group><fn fn-type="conflict"><p>The authors declare that there are no conflicts of interest present.</p></fn></fn-group></back></article>
