Natsume
Natsume Matsuzaki, Minou-Shi JP
Patent application number | Description | Published |
---|---|---|
20100034388 | DATA PROTECTION SYSTEM THAT PROTECTS DATA BY ENCRYPTING THE DATA - A data protection system is provided that reduces, to a degree, the amount of encrypted data that is distributed to a plurality of terminals. In the data protection system a terminal whose decryption keys are exposed by a dishonest party is made to be unable to decrypt the data correctly, while other terminals are able to decrypt the data correctly. | 02-11-2010 |
Natsume Matsuzaki, Mino JP
Patent application number | Description | Published |
---|---|---|
20080205652 | CONTENT PROTECTION SYSTEM, KEY DATA GENERATION APPARATUS, AND TERMINAL APPARATUS - A content protection system prevents illegal key acquisition, without checking uniqueness of device keys. The content protection system includes a key data generation apparatus and a user terminal. The key data generation apparatus converts first key data, which is for using content, based on a predetermined conversion rule, thereby generating second key data, encrypts the second key data using a device key held by valid terminals, and outputs the encrypted key data. The user terminal obtains the encrypted key data, decrypts the encrypted key data using a device key held by the user terminal, thereby generating second key data, converts the second key data based on a re-conversion rule corresponding to the conversion rule, thereby generating the first key data, and uses the content with use of the generated first key data. | 08-28-2008 |
20090070483 | GROUP JUDGMENT DEVICE - In a server, an echo-request transmitting unit | 03-12-2009 |
Natsume Matsuzaki, Mino-Shi JP
Patent application number | Description | Published |
---|---|---|
20080275991 | GROUP FORMATION/MANAGEMENT SYSTEM, GROUP MANAGEMENT DEVICE, AND MEMBER DEVICE - A group management device provides with a content a device included in a group managed by the group management device. The group management device includes a storage unit that stores a total number of remote device that the group management device currently registers, a maximum number of remote devices that the group management device is permitted to register, a total number of local device that the group management device currently registers, and a maximum number of local devices that the group management device is permitted to register. The group management device also includes a judging unit that judges whether the total number of the remote device exceeds the maximum number of the remote devices when it is judged that the one device is the remote device. The judging unit judges whether the total number of the local device exceeds the maximum number of the local devices when it is judged that the one device is the local device. | 11-06-2008 |
Natsume Suzuki, Tokyo JP
Patent application number | Description | Published |
---|---|---|
20140289058 | ADVERTISEMENT GENERATION APPARATUS AND TERMINAL DEVICE - An advertisement generation apparatus includes a generating unit that generates a page to foe displayed on a terminal device that displays an advertisement on a screen. The page includes a content page and an advertising page that are superimposed one on top of the other, where the content page includes an advertising space such that the advertising space is to be scrolled on the screen according to operation, and the advertising page is greater in size than the advertising space. The page is configured to display the content page, and a part of the advertising page located within the advertising space. | 09-25-2014 |