It is our pleasure to present you the proceedings of 2nd International Workshop on Intelligent Information technologies and Systems of Information Security (IntelITSIS-2021), held in Khmelnytskyi (Ukraine) in March 24-26, 2021. Tetiana Hovorushchenko 0 Oleg Savenko 0 Peter Popov 0 2nd International Workshop on Intelligent Information Technologies & Information Security Systems (IntelITSIS-2021) is organized by Computer Engineering & System Programming Department of Khmelnytskyi National University with the support of the PUBLIC ORGANIZATION “UKRAINIAN SCIENTIFIC AND EDUCATIONAL IT SOCIETY”

The IntelITSIS-2021 focuses on all technical and practical aspects of the latest research and results of international scientists and practitioners related to intelligent information technologies & information security systems. This workshop provides opportunities to exchange new ideas, to establish business or research relations and to find global partners for future collaboration. International Program Committee has 39 members. 100 % of the IntelITSIS-2021 International Program Committee members have more than 10 DBLP papers. There are the representatives of 10 Ukrainian Universities and of 16 Universities from around the world (United Kingdom, USA, Austria, Slovakia, Czech Republic, Turkey, Egypt, Poland, Estonia, and Greece). 2nd International Workshop on Intelligent Information Technologies & Systems of Information Security received 135 submissions from Ukraine and the world. All papers were evaluated by two or three reviewers. Based on the reviews, a rating of papers was compiled. Papers with a positive average scores were accepted for presentation at the Workshop. According to the decision of the International Program Committee, 59 papers were conditionally accepted for presentation at the workshop. We received camera-ready papers, which were also evaluated by reviewers (it was checked whether all comments and recommendations were taken into account). As a result, only 58 camera ready papers are accepted for presentation at the Workshop. The IntelITSIS-2021 joined scientists from Ukraine, United Kingdom, USA, Austria, Slovak Republic, Czech Republic, Turkey, Poland, Kazakhstan, Estonia, Germany, Egypt, Algeria, Malaysia, Morocco and Greece. In general, the representatives from 29 Universities from around the world, 1 industrial partner from Ukraine and 45 Ukrainian Universities will take part in the workshop. So, final acceptance rate is 43%. I would like to thank the members of International Program Committee and Organizing Committee, and external reviewers for their excellent and tireless work. I sincerely wish everyone fruitful work and interesting presentations! I hope that the workshop results make a significant contribution to the development of intelligent information technologies & information security systems in Ukraine and in the world.