TY JOUR TI The role of the service operator in ensuring security in the financial market KW financial law KW service operator KW financial security KW digitalization KW Bank of Russia KW supervision KW accreditation KW cybersecurity KW legal regulation KW public-private governance JO Journal of Legal Studies AU Tolmachev, V.V. PY 2026 IS 11 PB INFRA-M Academic Publishing LLC.