Risk-adaptive authorization in zero trust with dynamic trust and tokens

• Published in: PROBLEMS IN PROGRAMMING
• Date: 2026
• Issue: 1
• Pages: 66-81
• ISSN: 1727-4907
• Author Affiliations: Yu.V. Kostiuk — Borys Grinchenko Kyiv Metropolitan University; P.M. Skladannyi — Borys Grinchenko Kyiv Metropolitan University — ORCID: 0000-0002-7775-6039; D.D. Hnatchenko — State University of Trade and Economics
• Keywords: ризик-адаптивна авторизація, risk-based authentication, автентифікація користувачів, довірчий інтервал, zero trust нульова довіра, цифрова довіра, адаптивне передавання даних, безпека даних, захист інформації, ризики та адаптивність
• Main Authors: Kostiuk, Yu.V., Skladannyi, P.M., Hnatchenko, D.D.
• Format: Article
• Language: Ukrainian
• Published: PROBLEMS IN PROGRAMMING 2026
• Subjects: risk-adaptive authorizationж Zero Trust; access management; trust evaluation; token lifetime; identity security; policy-based access control; UDC 004.056.5:004.7
• Online Access: https://pp.isofts.kiev.ua/index.php/ojs1/article/view/892
• Journal Title: Problems in programming

The article addresses the problem of risk-adaptive authorization in a Zero Trust architecture using a mechanism of dynamic trust assessment and adaptive access token management. The relevance of the study is driven by the increasing number of attacks related to credential compromise, session hijacki...