Proceedings of the 11th International Conference on Applied Informatics (ICAI 2020) January 29–31, 2020 Eger, Hungary Edited by Gergely Kovásznai, Eszterházy Károly University István Fazekas, University of Debrecen Tibor Tómács, Eszterházy Károly University Organized by Copyright © 2020 for the individual papers by the papers’ authors. Copyright © 2020 for the volume as a collection by its editors. This volume and its papers are published under the Creative Commons License Attribution 4.0 International (CC BY 4.0). Preface This volume represents the proceedings of the 11th International Conference on Applied Informatics (ICAI 2020), held on January 29–31, 2020, in Eger, Hungary. The ICAI conferences are oriented toward professional exchange of ideas in the field of Applied Informatics. The goal of the conferences is to provide a forum for the discussion of academic research. The location of the conferences offers the unique atmosphere of an old medieval city in conjunction with Hungarian hospitality. The ICAI 2020 program included 88 talks in the following sections: • Artificial Intelligence including Machine Learning • Security and Cryptography • Computer Aided Geometric Modeling and Computer Graphics • Theoretical Computer Science • Data Science including Database Systems • Computer Networks and Cloud Services • Software Design and Object Oriented Programming • Testing and Verification including Formal Methods • Smart Solutions including Embedded Systems • Image Processing • Applications of Informatics • Education and other fields of Applied Informatics Also, the conference program included two sessions for 23 posters that presented ongoing work or achievements in the area of Applied Informatics to be displayed and discussed with other participants in an informal manner. After the conference 75 manuscripts were submitted and carefully peer-reviewed. The Program Committee selected 10 papers to be published in a special issue of the journal Annales Mathematicae et Informaticae and 45 papers to be published in the conference proceedings at CEUR-WS.org. This volume consists of those 45 papers. ICAI 2020 Committees Conference Chairmen • Fazekas, István • Kovásznai, Gergely Secretary • Tóth, Erzsébet • Király, Sándor Program committee • Balla, Tamás • Ispány, Márton • Popov, Nikolaj • Biró, Csaba • Jebelean, Tudor • Porkoláb, Zoltán • Bodó, Zalán • Juhász, Imre • Prantner, Csilla • Cerna, David • Juhász, Tibor • Racskó, Réka • Csató, Lehel • Király, Roland • Schreiner, Wolfgang • Csendes, Tibor • Kovacs, Laura • Szathmáry, László • Csuhaj-Varjú, • Kovásznai, Gergely • Szederkényi, Gábor Erzsébet • Sztrik, János • Kozsik, Tamás • Czapné Makó, Zita • Szűcs, Veronika • Kusper, Gábor • Fazekas, István • Tómács, Tibor • Lengyelné Molnár, • Fülöp, Zoltán Tünde • Tóth, Erzsébet • Geda, Gábor • Lovas, Róbert • Tóth, Zsolt • Herdon, Miklós • Mankovits, Tamás • Troll, Ede • Hoffmann, Miklós • Novák, Tamás • Vajda, Róbert • Horváth, Zoltán • Olajos, Péter • Vaszil, György • Horváth, Ildikó • Pataricza, András • Yang, Zijian Győző • Husi, Géza • Pethő, Attila • Zsakó, László Organizing Committee • Chairman: Kusper, Gábor • Kunné Tamás, Judit • Chairman: Király, Roland • Biró, Csaba • Király Sándor • Göböly, Klotild • Czapné Makó, Zita • Balaska, Piroska • Troll, Ede • Nagyné Bertalan, Ágnes • Balla, Tamás • Racskó, Réka • Szakács, Tamás • Tajti, Tibor • Takács, Péter • Bogdándy, Bence • Szigetváry, Péter In memoriam Dr. Lajos Csőke co-founder of ICAI (1941–2019)