Panasonic Corporation

Panasonic Intellectual Property Management Co., Ltd.

Masato Suto

Hirokazu So

Shinji Inoue

Takuji Maeda

Makoto Ochi

Toshiyuki Honda

Kazuya Fujimura

Yukiko Inoue

Manabu Inoue

Masahiro Nakanishi

Yoshikazu Katoh

Masayuki Toyama

Hiroshi Sakurai

Seiji Nakamura

Keizo Miyata

Hiroki Etoh

Shigekazu Kogita

A cryptographic processing device comprises a cipher control circuit operative to execute at least one of encryption of plaintext data and decryption of ciphertext data on the basis of conversion parameter data; and a memory cell array that includes a plurality of memory cells, the plurality of memory cells including: a memory cell in a variable state, in which a resistance value reversibly changes between a plurality of changeable resistance value ranges in accordance with an electric signal applied thereto; and a memory cell in an initial state, which does not change to the variable state unless a forming stress for changing the memory cell in the initial state to the variable state is applied thereto, a resistance value of the memory cell in the initial state being within an initial resistance value range which does not overlap with the plurality of changeable resistance value ranges, wherein in the memory cell array, data including the conversion parameter data is stored on the basis of whether each of the plurality of memory cells is in the initial state or the variable state.

Cryptographic processing device having a non-volatile memory including memory cells in an initial or a variable state

A nonvolatile memory apparatus is provided with a nonvolatile memory including a plurality of blocks each being a recording area of the data and a unit of erasing of the data, and a controller for controlling writing or reading of the data to/from the nonvolatile memory. Each of the blocks includes pages each being a unit of reading of the data. The controller, when data of a first page is read in response to the data read request from the external apparatus, reads data of an other page other than the first page in a block from which the data is read, and calculates a number of errors of the data in the other page, and rewrites the data into an other block when the block from which the data is read satisfies a predetermined condition on the error based on the calculated number of errors.

Nonvolatile memory apparatus and control method of nonvolatile memory apparatus

Upon copying data stored on a page in a copy source block of a nonvolatile memory to a page of a copy destination block, an access control unit of a memory controller copies data stored on a page associated with a first copy method to a page of the copy destination block after error correction by an error correction control unit copies data stored on a page associated with a second copy method to a page of the copy destination block without performing the error correction by the error correction control unit according to a copy mode stored in a copy mode storage area, and changes the copy mode associated with the copy destination block to a copy mode that is different from the copy mode of the copy source block.

Nonvolatile storage device performing periodic error correction during successive page copy operations

A memory controller includes a reading/writing control unit for controlling writing and reading of data to and from a physical block of a nonvolatile memory, a writing mode table for storing one of a first writing mode of protecting data against a power shutdown during writing and a second writing mode of writing data at a higher speed than the first writing mode, and a setting unit for setting the writing mode received from an access device in a writing mode table. The reading/writing control unit performs data writing based on the writing mode that has been set in the writing mode table.

Nonvolatile storage device, access device and nonvolatile storage system

In a memory controller according to the present invention, an external I/F unit receives ID information associated with data from the outside of a non-volatile memory, and a recording controller manages a recording position of the data in the non-volatile memory based on the ID information, so that an amount of time necessary for the retrieval of rights information based on the ID information is reduced.

Memory controller, nonvolatile storage system, and data management method

A recording medium () for storing content that can be read and written by a host device stores a content key (a key that is used for encrypting content) () encrypted in a first format, and a content key () that is encrypted in a second format for content that is the same as the content related to the content key () encrypted in the first format. The first format is, for example, a format used for distributed content, and the second format is a format used with local content.

Recording medium, and device and method for recording information on recording medium

A nonvolatile memory device () includes a plurality of physical blocks, each of which is provide with a nonvolatile memory (), a logic/physical address conversion table, a temporary block and a temporary table. The nonvolatile memory () includes a plurality of pages which are predetermined writing units, respectively. The logical-physical address conversion table () stores correspondence information between logic addresses and physical addresses of data to be stored in the physical blocks. The temporary block is a physical block to store data that are smaller in size than those of the page. The temporary table () stores correspondence information between logic addresses and physical addresses with respect to data to be stored in the temporary block.

Nonvolatile memory device including a logical-to-physical logig-to-physical address conversion table, a temporary block and a temporary table

A recording medium stores contents and contents keys to be used for encrypting the contents, in a plurality of storage formats. The storage formats include a storage format (a first format) for delivered contents acquired through a network, and a storage format (a second format) for local contents acquired by a method other than the delivery. The intrinsic storage formats of the contents to be stored in the recording medium are determined according to the kinds of the contents. The recording medium stores not only the contents and the contents keys but also original storage format information (an import flag) () which is information indicating the intrinsic storage formats of the contents. With reference to the original storage format information, a reproduction device selects a reproduction method in accordance with the intrinsic storage formats of the contents.

Recording medium, and information processing device and information processing method for the recording medium

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.

Data area managing method in information recording medium and information processor employing data area managing method

Data area managing method in information recording medium and information processor employing data area managing

A semiconductor memory card () has a plurality of areas () based on different file systems. An adapter () includes: an area switching part () which a user can operates, a determination part () for determining the operation; and a card controller () for issuing a switching command for switching the area to be used for the semiconductor memory card () in accordance with the judgment result. When the switching command is issued in response to input from the area switching part (), the command is interpreted by an area selector () of the semiconductor memory card () so as to select an area.

Recording medium access device and recording medium access method

An information processing device that reads out and records data from and on an information recording medium includes a file system controller. File system control information is constructed in a system memory within the information processing device, and the file system controller unifies and controls a plurality of information recording media which are managed by individual file systems into a single virtual file system. In addition, the file system controller manages a priority order that indicates an information recording medium to be utilized with priority if files having the same name exist. This priority order can be changed in response to a request from an application program. Thus, the processor can unify and manage the plurality of information recording media and, also, enables the application to access all of the files having the same name.

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Osaka, Japan

Masato Suto