Sony Corporation

Masayuki Ohbayashi

Han Min-Jae

Takashi Nakatsuyama

Yasushi Katsumata

A contents database in which data of contents enciphered by a C key is stored and provided for a contents server, wherein the contents data enciphered by the C key are enciphered by an M key and sent to a user machine. In the user machine, the contents data enciphered by the C key are stored in a storage device. Upon reproduction, the contents data enciphered by the C key from the storage device are sent to an enciphering/decoding processing unit and decoded and charging is performed in accordance with the C key. A dynamic authenticating code which dynamically changes with the elapse of time is added to the C key.

Data distributing apparatus and terminal apparatus for data distribution

A recording and/or playback apparatus having a first storage medium including a management region and a data region, an initializing device for initializing the first storage medium so that the first storage medium includes the management region and the data region, a generating device for generating a predetermined value when the initialization is performed, a second storage medium storing the predetermined value therein, a transforming device for applying a transformation to the predetermined value so as to be a different value, and a control device for controlling the output of the transforming device so as to store the output in the management region.

Growing community of inventors

Kanagawa, Japan

Masayuki Ohbayashi