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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">inform</journal-id><journal-title-group><journal-title xml:lang="ru">Информатика</journal-title><trans-title-group xml:lang="en"><trans-title>Informatics</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1816-0301</issn><issn pub-type="epub">2617-6963</issn><publisher><publisher-name>UIIP NASB</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.37661/1816-0301-2024-21-4-37-45</article-id><article-id custom-type="elpub" pub-id-type="custom">inform-1302</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>МАТЕМАТИЧЕСКОЕ МОДЕЛИРОВАНИЕ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>MATHEMATICAL MODELING</subject></subj-group></article-categories><title-group><article-title>О моделировании случайных данных для оценки качества статистических тестов в криптографии</article-title><trans-title-group xml:lang="en"><trans-title>On modeling random data to evaluate the performance of statistical tests in cryptography</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0007-8474-1146</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Палуха</surname><given-names>В. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Palukha</surname><given-names>U. Y.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Палуха Владимир Юрьевич, кандидат физико-математических наук, доцент, заведующий НИЛ математических методов защиты информации</p><p>пр. Независимости, 4, Минск, 220030</p></bio><bio xml:lang="en"><p>Uladzimir Y. Palukha, Ph. D. (Phys.-Math.), Assoc. Prof., Head of the Research Laboratory of Mathematical Methods of Information Security</p><p>av. Nezavisimosti, 4, Minsk, 220030</p></bio><email xlink:type="simple">palukha@bsu.by</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Прохорчик</surname><given-names>Н. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Prokharchyk</surname><given-names>M. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Прохорчик Николай Анатольевич, младший научный сотрудник, НИЛ математических методов защиты информации</p><p>пр. Независимости, 4, Минск, 220030</p></bio><bio xml:lang="en"><p>Mikalay A. Prokharchyk, Junior Researcher, Research Laboratory of Mathematical Methods of Information Security</p><p>av. Nezavisimosti, 4, Minsk, 220030</p></bio><email xlink:type="simple">prohorchikna@bsu.by</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4226-2546</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Харин</surname><given-names>Ю. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Kharin</surname><given-names>Yu. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Харин Юрий Семенович, доктор физико-математических наук, профессор, академик НАН Беларуси, директор, НИИ прикладных проблем математики и информатики</p><p>пр. Независимости, 4, Минск, 220030</p></bio><bio xml:lang="en"><p>Yuriy S. Kharin, D. Sc. (Phys.-Math.), Prof., Acad. of the National Academy of Sciences of Belarus, Dir., Research Institute for Applied Mathematics and Informatics</p><p>av. Nezavisimosti, 4, Minsk, 220030</p></bio><email xlink:type="simple">kharin@bsu.by</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Учреждение Белорусского государственного университета «НИИ прикладных проблем математики и информатики»</institution></aff><aff xml:lang="en"><institution>Research Institute for Applied Mathematics and Informatics Belarusian State University</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>30</day><month>12</month><year>2024</year></pub-date><volume>21</volume><issue>4</issue><fpage>37</fpage><lpage>45</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Палуха В.Ю., Прохорчик Н.А., Харин Ю.С., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Палуха В.Ю., Прохорчик Н.А., Харин Ю.С.</copyright-holder><copyright-holder xml:lang="en">Palukha U.Y., Prokharchyk M.A., Kharin Y.S.</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://inf.grid.by/jour/article/view/1302">https://inf.grid.by/jour/article/view/1302</self-uri><abstract><sec><title>Цели</title><p>Цели. Решается задача моделирования вектора вероятностей, распределенного равномерно на гиперсфере заданного радиуса с центром в точке, соответствующей дискретному равномерному распределению. Актуальность задачи состоит в том, что такой вектор вероятностей необходим для генерации случайных последовательностей при анализе вероятностей ошибок первого и второго рода статистических критериев качества криптографических генераторов, проверяющих сложную нулевую гипотезу.</p></sec><sec><title>Методы</title><p>Методы. Используются теория вероятностей и матричный анализ.</p></sec><sec><title>Результаты</title><p>Результаты. Разработаны метод и алгоритм моделирования вектора вероятностей, распределенного равномерно на гиперсфере заданного радиуса – точки в K-мерном пространстве, расположенной на пересечении гиперсферы и симплекса.</p></sec><sec><title>Заключение</title><p>Заключение. Работоспособность разработанного алгоритма моделирования вектора вероятностей, распределенного равномерно на гиперсфере заданного радиуса, проиллюстрирована компьютерными экспериментами. Генерируемый с помощью разработанного алгоритма вектор вероятностей может быть использован для моделирования псевдослучайной последовательности, позволяющей оценивать вероятности ошибок первого и второго рода статистических тестов, применяемых при анализе качества криптографических генераторов.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Objectives</title><p>Objectives. Financial networks with a rule of constrained equal awards for the distribution of the agent’s estate between its creditors are considered. The aim of the study is to develop an algorithm for constructing greatest clearing matrices for such networks under zero cash reserves of all agents.</p></sec><sec><title>Methods</title><p>Methods. Graph theory and mathematical programming methods are used.</p></sec><sec><title>Results</title><p>Results. A polynomial-time algorithm for constructing the greatest clearing matrices for financial networks with a rule of constrained equal awards for the distribution of the agent's estate between its creditors is proposed. It is assumed that the cash reserves of each agent are equal to zero (funds received from other agents are distributed among creditors). The algorithm is based on the use of the identified properties of weighted strongly connected graphs. Necessary and sufficient conditions are obtained under which the greatest clearing matrix is different from zero at zero cash reserves of agents'.</p></sec><sec><title>Conclusion</title><p>Conclusion. The developed approach can be used in constructing clearing algorithms for financial networks with other rules for distributing the agent’s estate between its creditors.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>криптографический генератор</kwd><kwd>статистическое тестирование</kwd><kwd>дискретное распределение вероятностей</kwd><kwd>распределение на гиперсфере</kwd><kwd>треугольная матрица</kwd><kwd>математическое моделирование</kwd></kwd-group><kwd-group xml:lang="en"><kwd>cryptographic generator</kwd><kwd>statistical testing</kwd><kwd>discrete probability distribution</kwd><kwd>distribution on a hypersphere</kwd><kwd>triangular matrix</kwd><kwd>mathematical modeling</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена при финансовой поддержке в рамках отдельного проекта № 20231671 Министерства образования Республики Беларусь.</funding-statement><funding-statement xml:lang="en">The work was performed with the financial support within the framework of the separate project No. 20231671 of the Ministry of Education of the Republic of Belarus.</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Eisenberg, L. 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