FIELD: information technology.
SUBSTANCE: device comprises: a parser (102) for obtaining primary and secondary information (104) of the multimedia product rights object (RO), recognising the rights encryption key (REK); a secondary information (106) encryption (108) unit; a signature generator (112) of the source device authenticating at least the primary information (104) of the multimedia product rights object; and a recording device for storing primary information (104) such that it can be read by at least one more device, for storing encrypted secondary information (106').
EFFECT: increasing cryptographic security of a backup rights object through a unified backup format.
16 cl, 6 dwg
