| Patent application number | Description | Published |
|---|
| 20080270796 | SYSTEM AND METHOD FOR PROVIDING PROGRAM INFORMATION, AND RECORDING MEDIUM USED THEREFOR - A system for providing program information has a user terminal, a recording medium capable of reading information therefrom and writing information thereto through a command issued by the user terminal, and a server connected to the user terminal via a network, and provides program information from the server to the recording medium. The recording medium has a first control unit that performs a first mutual authentication operation with a first storage unit capable of writing program information thereto and the user terminal, and that executes a command to write program information to the first storage unit only if the first mutual authentication operation is successful. The user terminal performs a second mutual authentication operation with the server, obtains program information transmitted from the server if the second mutual authentication operation is successful, and issues a command to write the program information to the first storage unit of the recording medium. | 10-30-2008 |
| 20080298580 | CONTENT DELIVERY SERVER AND CONTENT DELIVERY SYSTEM - A content delivery server comprises a packet generator operative to generate packetized content data; an encryptor operative to encrypt the packetized content data with content key data to generate encrypted content data and also operative to encrypt the content key data with user key data to generate encrypted content key data; a TS multiplexer operative to multiplex the encrypted content data into a transport stream and add the encrypted content key data to a TS header thereof; and a transmitter operative to transmit the transport stream to a user terminal. | 12-04-2008 |
| 20090022318 | CONTENT DATA DISTRIBUTION TERMINAL AND CONTENT DATA DISTRIBUTION SYSTEM - A content distribution terminal includes a user key data generation unit generating new user key data representing a new version of the user key data; a user key update unit capturing, from the recordable medium, already-recorded user key data that has already been recorded on the recordable medium, and ordering the user key data generation unit to generate the new user key data when a predetermined situation is identified in the already-recorded user key data to execute an update procedure for the user key data; an erase control unit erasing, when a predetermined situation is identified in the already-recorded user key data, the first encrypted content key data that is encrypted with the already-recorded user key data and stored in the recordable medium; an encryption/decryption unit decrypting, with terminal-unique key, second encrypted content key data resulting from encryption of the content key data with different terminal-unique keys for different terminals, encrypting again content key data resulting from decryption of the second encrypted content key data with the new user key data to generate the first encrypted content key data, and encrypting the content data with the content key data to generate the encrypted content data; a write control unit writing the data to the recordable medium. | 01-22-2009 |
| 20090296937 | DATA PROTECTION SYSTEM, DATA PROTECTION METHOD, AND MEMORY CARD - This data protection system encrypts and stores data in a memory card, using a double encryption key scheme for encrypting the data with a data key and further encrypting the data key with a user key. This system provides data to a particular host device from the memory card and limits provision of the data to other host devices. The host device includes DPS program that governs control of writing data to, and reading data from the memory card. The memory card includes a first non-volatile memory and a memory controller that controls the first non-volatile memory. DPSA program is implemented in the memory controller that manages ID information for identifying a user capable of decrypting the encrypted data with the user key. | 12-03-2009 |
| 20100268948 | RECORDING DEVICE AND CONTENT-DATA DISTRIBUTION SYSTEM - A recording device comprises a memory unit configured to be communicationable with an external device and to record key data for encryption of content data through an authentication process, and a controller which controls the memory unit. The memory unit comprises a normal recording unit which is accessible from the exterior through the controller without an authentication process, a protected recording unit which is accessible from the external device when authentication of a first authentication process completes, and a writing restricted/protected recording unit which is accessible from the external device when authentication of a second authentication completes and is unwritable and unaccessible from the external device when authentication of only the first authentication process completes. | 10-21-2010 |
| 20100268953 | RECORDING DEVICE, AND CONTENT-DATA PLAYBACK SYSTEM - A recording device configured to store content data in an encrypted manner, the recording device comprises a memory unit which stores various data, and a controller which controls the memory unit. The controller possesses a controller key and unique identification information, and is configured to generate a controller-unique key unique for each controller in accordance with the controller key and the identification information. The memory unit stores an MKB generated by encrypting a medium key with a device key set that is a collection of a plurality of device keys, an encrypted device key set generated by encrypting the device key set with the controller-unique key, and a device-key-set index which uniquely identifies the device key set. The controller comprises a decryption unit which obtains a device key set by decrypting the encrypted device key set with the controller-unique key, an ID generating unit which generates a medium ID from the identification information and the device-key-set index, and an authentication unit which executes an authentication process with an exterior in accordance with the device key set, the medium ID and the MKB. | 10-21-2010 |
| 20110035579 | CONTENT DISTRIBUTION METHOD AND CONTENT DISTRIBUTION PACKAGE - A content distribution method distributes a package containing a content from a content distribution apparatus to a terminal of a content distribution destination and causes the terminal to expand and display the content contained in the distributed package by using expansion software provided in the terminal. Update data of the expansion software is inserted in the package in addition to the content. When the terminal cannot expand the content by using the expansion software provided in it, the terminal updates the expansion software provided in it by using the update data contained in the distributed package and expands the content by using the updated expansion software. | 02-10-2011 |
| Patent application number | Description | Published |
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| 20080260155 | Storage Medium Processing Method, Storage Medium Processing Device, and Program - Spread of a forged storage medium is prevented suppressing an authentic storage medium's damage and trouble of a owner to the minimum. When there is an update request of user key data, the update history of the user key data concerning the shown above-mentioned medium identifier IDm is referred to. When judged that the update of the user key data concerning the shown medium identifier IDm not being performed within a predetermined period, the update of user key data is performed. The request of a update is refused when judged that the update of the user key data concerning the shown medium identifier IDm being performed within a predetermined period. | 10-23-2008 |
| 20080294562 | Storage Medium Processing Method, Storage Medium Processing Device, and Program - The content data is offered not only to specific storage media but also to the storage media of several different types. Various kinds of storage media (SDq, MSq, HDDq, etc.) enabled to acquire data from a license center unit | 11-27-2008 |
| 20080310638 | Storage Medium Processing Method, Storage Medium Processing Device, and Program - A situation where accesses concentrate on a release day is eased. A user terminal | 12-18-2008 |
