TY JOUR TI METHODS OF DETECTING AND RESEARCHING HIDDEN INFORMATION ON ELECTRONIC MEDIA KW information KW concealment of computer information KW search for hidden computer information KW crime in-vestigation KW computer expertise KW computer-technical expertise KW encryption KW encryption KW steganography KW cryptographic containers KW recovery of deleted computer information JO VESTNIK ADVANCED TRAINING INSTITUTE OF THE MIA OF RUSSIA AU Ryasov, A.A. PY 2025 IS 0 PB All-Russian Advanced Training Institute of the Ministry of the Interior of the Russian Federation