Armstrong, Westerman, Hattori, McLeland & Naughton, LLP
Digital content management system and apparatus
There are provided a digital content management apparatus which further embodies a digital content management apparatus used with a user terminal, and a system which protects the secrets of a digital content. The system and the apparatus are a real time operating system using a microkernel, which is incorporated in the digital content management apparatus as an interruption process having high priority. When a user uses the digital content, whether there is an illegitimate usage or not, is watched by interrupting the usage process. In the case where illegitimate usage is carried out, a warning is given or the usage is stopped. The decryption/re-encryption functions of the digital content management apparatus having the decryption/re-encryption functions are not restricted to the inside of the user apparatus. By providing the decryption/re-encryption functions between the networks, the exchange of secret information between different networks is secured. By using this apparatus for converting a crypt algorithm, information exchange is made possible between systems which adopt different algorithms.
Mitsubishi Corporation
H G G H G G G G G H H H G H H G H H H H H G G H H G H G H G
H04N G06F G06F H04N G06Q G06Q G06Q G06Q G06F H04N H04N H04N G07F H04L H04N G06F H04L H04L H04L H04N H04N G06Q G06F H04N H04N G06Q H04N G06Q H04N G07F
inventional additional additional inventional inventional inventional inventional inventional additional inventional inventional inventional inventional inventional inventional additional inventional inventional inventional inventional inventional inventional inventional inventional inventional inventional inventional inventional inventional inventional
Makoto
Saito