Patent application number | Description | Published |
20080212770 | Key Information Generating Method and Device, Key Information Updating Method, Tempering Detecting Method and Device, and Data Structure of Key Information - A domain key is used to perform chaining decryption with respect to encrypted content key information (ST | 09-04-2008 |
20080288710 | Semiconductor Memory Device and Its Control Method - A card information storage part ( | 11-20-2008 |
20090013195 | Data Storing Method, Data Playback Method, Data Recording Device, Data Playback Device, and Recording Medium - Provided is a method for performing high-speed search for a content key associated with encrypted content in the case of a key-separation-type content management method where content keys and their respective pieces of encrypted content are correlated by ID information and stored in different recording media. An external recording medium is used to store a plurality of content files that contain: their respective pieces of encrypted content that are encrypted with different encryption keys; and their respective content IDs, each being associated with a corresponding piece of the encryption content, and a semiconductor recording medium is used to store a list that contains: pieces of encryption key storage location information, each indicating where a corresponding one of the encryption keys is stored; and the content IDs, the list being sorted in accordance with the content IDs. When encrypted content is played back, the list is searched to find encryption key storage location information associated with a content ID that matches the content ID of the encrypted content, and the encryption key is read based on the encryption key storage location information. | 01-08-2009 |
20090037721 | PROGRAM DEVELOPMENT METHOD, PROGRAM DEVELOPMENT SUPPORTING SYSTEM, AND PROGRAM INSTALLATION METHOD - An development environment of a high security level is provided for a key-installed system. Development of a program for a system having an LSI device which includes a secure memory is performed by providing another LSI device having the same structure and setting the provided LSI device to a development mode which is different from a product operation mode. Alternatively, the provided LSI device is set to an administrator mode to perform development and encryption of a key-generation program. The LSI device is set to a key-generation mode to execute the encrypted key-generation program, thereby generating various keys. | 02-05-2009 |
20090138728 | Program update method and server - A system including a secure LSI | 05-28-2009 |
20090147960 | CONTENT SEARCH DEVICE - A content search device calculates the number of valid encrypted contents as comparison objects contained in encrypted content databases and the number of valid decryption keys contained in decryption key databases. The database having the smaller number is decided to be a reference database. By successively reading out entries contained in the reference database, a combination of an encrypted content and a corresponding decryption key is searched. | 06-11-2009 |
20090231968 | RECORDING MEDIUM STORING MANAGEMENT INFORMATION FOR CONTENT ATTRIBUTE AND RECORDING DEVICE AND PLAYBACK DEVICE FOR THE RECORDING MEDIUM - A semiconductor recording medium stores attribute management information for managing various attribute information on a content (genre, composer, artist, album, title, etc.) for each item; and sort management information managing information on a sort order when information managed by the attribute management information is sorted by a predetermined procedure. The attribute management information contains character data indicating items to be managed and pointer information indicating link relationship between the attribute management information. The sort management information contains information on the sort order when all the entries in each of attribute management information are sorted by a predetermined procedure for each of attribute management information. | 09-17-2009 |
20090232312 | ENCRYPTED CONTENT REPRODUCTION DEVICE, ENCRYPTED CONTENT REPRODUCTION METHOD, PROGRAM, AND RECORDING MEDIUM FOR STORING THE PROGRAM - The invention presents an encrypted content playback equipment capable of decryption and playback of an encrypted content by using key information when a key medium storing the key information is not inserted, an encrypted content playback method, a program, and a recording medium for storing the program. | 09-17-2009 |
20100005109 | MEMORY CONTROLLER, NONVOLATILE STORAGE DEVICE, AND NONVOLATILE STORAGE DEVICE SYSTEM - A memory controller, a nonvolatile storage device and a nonvolatile storage device system are provided, in which the matching check between content data and meta data can be simplified, a starting time can be shortened, and further, a host device side can provide users with a common GUI without being conscious of the Usage Rule including an encryption method for copyright protection and a copyright protection method and a content management. A write status holding unit that holds write status information to identify the content data being written, and a content management unit that manages the content data and the meta data are included. The content management unit eliminates mismatch between the content data and the meta data based on the write status information. Further, a GUI script generating unit is included which generates a script describing the screen display contents in accordance with a request from the host device for the content data. | 01-07-2010 |
20100205461 | METHOD FOR GENERATING DATA FOR DETECTION OF TAMPERING, AND METHOD AND APPARATUS FOR DETECTION OF TAMPERING - In a target apparatus which stores at least one piece of domain key information in a first area and a plurality of pieces of content key information each associated with any one of the domain key information in a second area, a method for generating data for detecting tampering of the content key information. The method comprises the steps of encrypting the content key information associated with one of the domain key information using a chain encryption technique; extracting data at predetermined positions in the encrypted content key information, concatenating the pieces of data extracted at the predetermined positions in the encrypted content key information to obtain concatenated data, performing a hash calculation with respect to the concatenated data to obtain a hash value, storing check values corresponding to the data at the predetermined positions in plain text, in the target apparatus, and storing the hash value in the target apparatus. | 08-12-2010 |
20100217787 | CONTROLLER, INFORMATION RECORDING DEVICE, ACCESS DEVICE, INFORMATION RECORDING SYSTEM, AND INFORMATION RECORDING METHOD - In a file system such as an FAT file system, clusters are linked only in the forward direction. To perform seeks to clusters in the reverse direction, links need to be followed from the beginning side of the file data in every seeking operation. When a large amount of data is subjected to such reverse seeking, the overhead will be particularly large. A memory controller ( | 08-26-2010 |
20100268899 | MEMORY CONTROLLER, NONVOLATILE STORAGE DEVICE, DATA PROCESSING DEVICE, NONVOLATILE STORAGE DEVICE SYSTEM, AND METHOD - A memory controller ( | 10-21-2010 |
20100329456 | SEMICONDUCTOR DEVICE INCLUDING ENCRYPTION SECTION, SEMICONDUCTOR DEVICE INCLUDING EXTERNAL INTERFACE, AND CONTENT REPRODUCTION METHOD - A secure LSI device | 12-30-2010 |
20100332717 | ACCESS DEVICE, INFORMATION RECORDING DEVICE, CONTROLLER, AND INFORMATION RECORDING SYSTEM - Provided is a method that, in the case of managing areas of a non-volatile memory of an information recording module by a file system, increases the speed of processing for writing file data and file system management information, and furthermore prevents a decrease in the rewriting lifetime of the non-volatile memory. The information recording module ( | 12-30-2010 |
20110022645 | ACCESS DEVICE, INFORMATION RECORDING DEVICE, INFORMATION RECORDING SYSTEM, FILE MANAGEMENT METHOD, AND PROGRAM - An information recording device, which includes a nonvolatile memory whose areas are managed using an FAT file system and enhances the reliability of directory entries using a cyclic shift checksum, recalculates the cyclic shift checksum efficiently and performs seeking at a higher speed. A nonvolatile memory ( | 01-27-2011 |
20110022807 | WRITE ONCE RECORDING DEVICE - An access device | 01-27-2011 |
20110055467 | DATA AREA MANAGING METHOD IN INFORMATION RECORDING MEDIUM AND INFORMATION PROCESSOR EMPLOYING DATA AREA MANAGING METHOD - Area management information is cached in a cache memory by controlling the access size when an information processor accesses the area management information in an information recording medium. When the processing content of the information processor is to retrieve a free area from the area management information, a physical management block size determined from the physical characteristics of the information recording medium is used. When the processing content is to acquire a link destination from the area management information, minimum access unit of the information recording medium is used. Consequently, overhead can be lessened when the area management information is accessed. | 03-03-2011 |
20110125928 | HOST DEVICE, STORAGE DEVICE, AND METHOD FOR ACCESSING STORAGE DEVICE - A host device is connected to a storage device via a bus and reads and writes data in the storage device. The host device includes a command transmitter that sequentially transmits a command in a command sequence, which includes a set of commands which do not change data stored in the storage device, and a response receptor that accepts a response from the storage device for each command transmission from the command transmitter and determines whether or not an error exists. An acceptable/unacceptable access determiner provided in the host device enables access to the storage device when a normal response is identified by the response receptor and otherwise determines that access to the storage device is unacceptable. The normal response is when the responses received from the storage device for the transmissions of all commands in the command sequence do not include an error. | 05-26-2011 |
20110202752 | SEMICONDUCTOR DEVICE INCLUDING ENCRYPTION SECTION, SEMICONDUCTOR DEVICE INCLUDING EXTERNAL INTERFACE, AND CONTENT REPRODUCTION METHOD - A secure LSI device | 08-18-2011 |
20110302225 | ACCESS DEVICE, INFORMATION RECORDING DEVICE, INFORMATION RECORDING SYSTEM, FILE MANAGEMENT METHOD, AND PROGRAM - An information recording device, which includes a nonvolatile memory whose areas are managed using an FAT file system and enhances the reliability of directory entries using a cyclic shift checksum, recalculates the cyclic shift checksum efficiently and performs seeking at a higher speed. A nonvolatile memory ( | 12-08-2011 |
20120205952 | ROCKING CHAIR - Provided is a chair suited to the use of a keyboard or mouse, the chair has a seat | 08-16-2012 |
20130151836 | SEMICONDUCTOR DEVICE INCLUDING ENCRYPTION SECTION, SEMICONDUCTOR DEVICE INCLUDING EXTERNAL INTERFACE, AND CONTENT REPRODUCTION METHOD - A secure LSI device | 06-13-2013 |
20140129849 | SEMICONDUCTOR DEVICE INCLUDING ENCRYPTION SECTION, SEMICONDUCTOR DEVICE INCLUDING EXTERNAL INTERFACE, AND CONTENT REPRODUCTION METHOD - A secure LSI device | 05-08-2014 |