TY JOUR TI Digital «anchor»: a conceptual model of the use of blockchain technology for management of the medical data of forced migrants (refugees) KW blockchain KW decentralization KW sovereign digital identity KW medical data KW information security KW interoperability KW forced migrants KW distributed ledger JO Medical Bulletin of the Ministry of Internal Affairs AU Kraynyukov, P.E. AU TOLSTOShEEV, V.N. AU GUZEEV, R.N. AU LEMESHKIN, R.N. PY 2026 IS 2026 PB State institution Joint editorial office of the Ministry of Internal Affairs of Russia