TY CONF TI FUTURE DEVELOPMENT OF AN INTELLIGENT OFFLINE SYSTEM FOR DE-IDENTIFICATION AND FIELD-LEVEL ENCRYPTION OF PERSONAL DATA IN DOCUMENTS KW personal data KW depersonalization of documents KW field encryption KW integrity control KW PDF documents KW offline processing KW product lifecycle KW information security JO MODELING INFORMATION SYSTEMS AND TECHNOLOGIES – 2026 AU Nadenov, A.E. AU Avilova, O.A. AU Skvorcova, E.I. PY 2026 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov