Pasichnyk, V.A., Pasichnyk, A.N. and Riabenko, V.I. 2026. MATHEMATICAL MODELS AND ALGORITHMS OF CRYPTOGRAPHIC DATA PROTECTION IN DISTRIBUTED INFORMATION SYSTEMS. Systems and Technologies. 71, 1 (Jan. 2026), 21-27. DOI:https://doi.org/10.32782/2521-6643-2026-1-71.3.