FIELD: protection of information.
SUBSTANCE: in accordance to the method, computer information to be concealed is repeatedly included in private container-files, which are combined, in their turn, to form a single conditional message-file, which also may be included in private container-files of next levels, etc, selective cryptographic protection of data of message or its parts is performed, while storage of information about methods of access to various data is realized using a structure, wherein for each message its individual number is present as well as message byte number, bit number in message byte, name of the file - steganographic container with inclusion of its full location address in operation system, byte address in steganographic container, number of bit in byte of steganographic container, number of iteration.
EFFECT: increased resistance of data being protected to steganographic analysis.
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