FIELD: radio engineering, communication.
SUBSTANCE: information security method, which includes encrypting data recorded in the form of a file by encrypting each memory structural unit (sector/group of sectors) containing file data with a separate key. The size of the memory structural unit to be encrypted with an independent key is predetermined. Each memory structural unit is encrypted with a key randomly selected from an array of keys generated in advance and stored in a personal data storage unit. The disclosed method also includes monitoring control commands and the type of external storage, which prevents writing of unauthorised data into the external storage or prevents use of modified storages.
EFFECT: improved security of information stored in an external medium.
4 cl, 2 dwg
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