Patents by Inventor Hiroyuki Sakamoto

Hiroyuki Sakamoto has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • AUTHENTICATOR, AUTHENTICATEE AND AUTHENTICATION METHOD
    Publication number: 20140047239
    Abstract: According to one embodiment, an authenticatee includes a memory configured to store a plurality of pieces of secret information XY and a plurality of pieces of secret information XYE which are created by encrypting the plurality of pieces of secret information XY, a generation module configured to generate a random number A, a generation module configured to generate a random number D which is composed of at least a part of the generated random number A and a random number B which is received, a calculating module configured to generate data C by executing a compression operation with respect to at least the random number D and the secret information XY loaded from the memory, a generation module configured to generate data ?, and a bit-by-bit addition module configured to calculate an result Z from the data ? to the data C.
    Type: Application
    Filed: September 26, 2011
    Publication date: February 13, 2014
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yuji Nagai, Taku Kato, Hiroyuki Sakamoto
  • RECORDING DEVICE, AND CONTENT-DATA PLAYBACK SYSTEM
    Publication number: 20140040634
    Abstract: 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.
    Type: Application
    Filed: October 3, 2013
    Publication date: February 6, 2014
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Shinichi Matsukawa, Taku Kato, Akihiro Kasahara, Hiroshi Suu, Atsushi Kondo, Jun Sato, Akira Miura, Hiroyuki Sakamoto
  • STORAGE SYSTEM IN WHICH FICTITIOUS INFORMATION IS PREVENTED
    Publication number: 20140032910
    Abstract: According to one embodiment, a storage system includes a host device, a secure storing medium, and a non-secure storing medium. The secure storing medium includes a memory provided with a protected first storing region which stores secret information sent from the host device, and a second storing region which stores encoded contents, and a controller which carries out authentication processing for accessing the first storing region. The host device and the secure storing medium produce a bus key which is shared only by the host device and the secure storing medium by authentication processing, and which is used for encoding processing when information of the first storing region is sent and received between the host device and the secure storing medium. The host device has the capability to request the secure storing medium to send a status.
    Type: Application
    Filed: September 20, 2012
    Publication date: January 30, 2014
    Inventors: Yuji NAGAI, Yasufumi TSUMAGARI, Shinichi MATSUKAWA, Hiroyuki SAKAMOTO, Hideki MIMURA
  • STORAGE SYSTEM IN WHICH INFORMATION IS PREVENTED
    Publication number: 20140032867
    Abstract: According to one embodiment, a storage system includes a host device, 2 storing medium. The secure storing medium includes: a memory provided with a protected first storing region which stores secret information sent from the host device, and a second storing region which stores encoded contents; and a controller which carries out authentication processing for accessing the first storing region. The host device and the secure storing medium produce a bus key which is shared only by the host device and the secure storing medium by authentication processing, and which is used for encoding processing when information of the first storing region is sent and received between the host device and the secure storing medium. The host device has the capability to request the secure storing medium to send a status.
    Type: Application
    Filed: October 2, 2012
    Publication date: January 30, 2014
    Inventors: Yuji NAGAI, Yasufumi TSUMAGARI, Shinichi MATSUKAWA, Hiroyuki SAKAMOTO, Hideki MIMURA
  • STORAGE SYSTEM IN WHICH INFORMATION IS PREVENTED
    Publication number: 20140032866
    Abstract: According to one embodiment, a storage system includes a host device, 2 storing medium. The secure storing medium includes: a memory provided with a protected first storing region which stores secret information sent from the host device, and a second storing region which stores encoded contents; and a controller which carries out authentication processing for accessing the first storing region. The host device and the secure storing medium produce a bus key which is shared only by the host device and the secure storing medium by authentication processing, and which is used for encoding processing when information of the first storing region is sent and received between the host device and the secure storing medium. The host device has the capability to request the secure storing medium to send a status.
    Type: Application
    Filed: October 2, 2012
    Publication date: January 30, 2014
    Inventors: Yuji NAGAI, Yasufumi Tsumagari, Shinichi Matsukawa, Hiroyuki Sakamoto, Hideki Mimura
  • ELECTRONIC DEVICE WITH CARD INTERFACE
    Publication number: 20140032805
    Abstract: When initializing a card-shaped device inserted in a card interface, operation mode acquiring means incorporated in an electronic device acquires operation mode information, stored in a register file incorporated in the card-shaped device, by a predetermined procedure using a predetermined pin. Operation mode setting means incorporated in the electronic device executes signal assignment on a plurality of data pins peculiar to an operation mode indicated by the acquired operation mode information, thereby switching a data transfer width, and allowing the card-shaped device to operate in the operation mode.
    Type: Application
    Filed: July 23, 2013
    Publication date: January 30, 2014
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Kosei OKAMOTO, Hiroyuki SAKAMOTO, Akihisa FUJIMOTO, Masao SUGA
  • STORAGE SYSTEM IN WHICH INFORMATION IS PREVENTED
    Publication number: 20140032868
    Abstract: According to one embodiment, a storage system includes a host device, 2 storing medium. The secure storing medium includes: a memory provided with a protected first storing region which stores secret information sent from the host device, and a second storing region which stores encoded contents; and a controller which carries out authentication processing for accessing the first storing region. The host device and the secure storing medium produce a bus key which is shared only by the host device and the secure storing medium by authentication processing, and which is used for encoding processing when information of the first storing region is sent and received between the host device and the secure storing medium. The host device has the capability to request the secure storing medium to send a status.
    Type: Application
    Filed: October 2, 2012
    Publication date: January 30, 2014
    Inventors: Yuji NAGAI, Yasufumi TSUMAGARI, Shinichi MATSUKAWA, Hiroyuki SAKAMOTO, Hideki MIMURA
  • STORAGE SYSTEM IN WHICH FICTITIOUS INFORMATION IS PREVENTED
    Publication number: 20140032934
    Abstract: According to one embodiment, a storage system includes a host device and a secure storage. The host device and the secure storage produce a bus key which is shared only by the host device and the secure storage by authentication processing, and which is used for encoding processing. The host device produces a message authentication code including a message which can be stored in the secure storage based on the bus key, and sends the produced message authentication code to the secure storage. The secure storage stores the message included in the message authentication code in accordance with instructions of the host device. The host device verifies whether the message stored in the secure storage is intended contents.
    Type: Application
    Filed: December 31, 2012
    Publication date: January 30, 2014
    Inventors: Yuji NAGAI, Yasufumi TSUMAGARI, Shinichi MATSUKAWA, Hiroyuki SAKAMOTO, Hideki MIMURA
  • STORAGE SYSTEM IN WHICH INFORMATION IS PREVENTED
    Publication number: 20140032865
    Abstract: According to one embodiment, a storage system includes a host device, a first storing medium, and a second storing medium. The first storing medium includes: a memory provided with a protected first storing region which stores first information sent from the host device, and a second storing region which stores encoded contents; and a controller which carries out authentication processing for accessing the first storing region. The host device and the storing medium produce a bus key which is shared only by the host device and the storing medium by authentication processing, and which is used for encoding processing when information of the first storing region is sent and received between the host device and the storing medium. The host device has the capability to request the storing medium to send a status.
    Type: Application
    Filed: October 1, 2012
    Publication date: January 30, 2014
    Inventors: Yuji NAGAI, Yasufumi Tsumagari, Shinichi Matsukawa, Hiroyuki Sakamoto, Hideki Mimura
  • ALKALINE STORAGE CELL AND METHOD FOR MANUFACTURING ALKALINE STORAGE CELL
    Publication number: 20140004424
    Abstract: An alkaline storage cell comprises a positive electrode including a cobalt additive and nickel hydroxide particles that have been covered by a cobalt compound film layer, and a negative electrode including a hydrogen-absorbing alloy that contains nickel and cobalt. The positive electrode has a capacitance V, the negative electrode has a capacitance W, the cobalt additive is cobalt metal or a cobalt compound, the positive electrode contains X mass % of the cobalt additive, the cobalt is included by Y mass % in the hydrogen-absorbing alloy, and X, Y, V, and W satisfy the relationship 1.1?(X/Y)×(W/V)?1.91.
    Type: Application
    Filed: May 30, 2012
    Publication date: January 2, 2014
    Applicant: PRIMEARTH EV ENERGY CO., LTD.
    Inventors: Yuuki Sakitou, Hiroyuki Sakamoto
  • MEMORY SYSTEM IN WHICH EXTENDED FUNCTION CAN EASILY BE SET
    Publication number: 20130318281
    Abstract: According to one embodiment, a memory system, such as a SDIO card, includes a nonvolatile semiconductor memory device, a control section, a memory, an extended function section, and an extension register. The extended function section is controlled by the control section. A first command reads data from the extension register in units of given data lengths. A second command writes data to the extension register in units of given data lengths. A extension register includes a first area, and second area different from the first area, information configured to specify a type of the extended function and controllable driver, and address information indicating a place to which the extended function is assigned, the place being on the extension register, are recorded in the first area, and the second area includes the extended function.
    Type: Application
    Filed: August 1, 2013
    Publication date: November 28, 2013
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Akihisa FUJIMOTO, Hiroyuki Sakamoto
  • Positive electrode for lithium secondary batteries and use thereof
    Patent number: 8586239
    Abstract: The invention provides a positive electrode for lithium secondary batteries, comprising a conductive layer overlaid on the surface of a positive electrode collector, and an active material layer overlaid on the conductive layer, wherein the conductive layer comprises at least one water-insoluble polymer, as a binder, that is soluble in organic solvents, and a conductive material; the active material layer comprises at least one aqueous polymer, as a binder, that is soluble or dispersible in water, a positive electrode active material, and a conductive material; and the average particle size (DA) of the conductive material in the conductive layer is smaller than the average particle size (DB) of the conductive material in the active material layer.
    Type: Grant
    Filed: January 26, 2009
    Date of Patent: November 19, 2013
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Hiroyuki Sakamoto
  • Recording device, and content-data playback system
    Patent number: 8578177
    Abstract: 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.
    Type: Grant
    Filed: March 4, 2010
    Date of Patent: November 5, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Shinichi Matsukawa, Taku Kato, Akihiro Kasahara, Hiroshi Suu, Atsushi Kondo, Jun Sato, Akira Miura, Hiroyuki Sakamoto
  • MEMORY CHIP
    Publication number: 20130290738
    Abstract: According to one embodiment, a memory chip, which is connected to a controller that controls reading and writing of data in response to a request from an external device, includes: a memory including a special area that is a predetermined data storage area; a key storage unit that stores therein a second key that corresponds to a first key used by the external device to convert the data; a converting unit that receives, from the controller, data to be written into the special area and generates converted data by converting the data to be written using the second key; and a writing unit that writes the converted data into the special area.
    Type: Application
    Filed: June 24, 2013
    Publication date: October 31, 2013
    Inventors: Toru KAMBAYASHI, Akihiro Kasahara, Shinichi Matsukawa, Hiroyuki Sakamoto, Taku Kato, Hiroshi Sukegawa, Yoshihiko Hirose, Atsushi Shimbo, Koichi Fujisaki
  • DEVICE AND MEMORY SYSTEM FOR MEMORY MANAGEMENT USING ACCESS FREQUENCY INFORMATION
    Publication number: 20130254471
    Abstract: An integrated memory management device according to an example of the invention comprises an acquiring unit acquiring a read destination logical address from a processor, an address conversion unit converting the read destination logical address into a read destination physical address of a non-volatile main memory, an access unit reading, from the non-volatile main memory, data that corresponds to the read destination physical address and has a size that is equal to a block size or an integer multiple of the page size of the non-volatile main memory, and transmission unit transferring the read data to a cache memory of the processor having a cache size that depends on the block size or the integer multiple of the page size of the non-volatile main memory.
    Type: Application
    Filed: May 9, 2013
    Publication date: September 26, 2013
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Atsushi Kunimatsu, Hiroto Nakai, Hiroyuki Sakamoto, Kenichi Maeda
  • Programmable memory system
    Patent number: 8516178
    Abstract: In one embodiment, a system having a non-volatile programmable memory and a controller is provided. The system has data pins that are configured to be accessed in one of a first mode and a second mode such that, in the first mode, the system receives information using one of the data pins and, in the second mode, the system receives information using four of the data pins. The system also has a command pin that is configured to receive a first command, a second command, and a third command, the first command requesting a current operation mode of the data pins, the second command requesting operation voltage information of the system, and the third command setting the system into one of the first and second modes. Additionally, the system has a power signal pin configured to receive power for the system.
    Type: Grant
    Filed: June 19, 2012
    Date of Patent: August 20, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Kosei Okamoto, Hiroyuki Sakamoto, Akihisa Fujimoto, Masao Suga
  • MEMORY MANAGEMENT DEVICE AND MEMORY MANAGEMENT METHOD
    Publication number: 20130198437
    Abstract: In an embodiment, a device includes a first unit, a second unit, and a third unit. The first unit generates a write address representing a write position to sequentially store sequential data from a processor to a nonvolatile main memory. The second unit generates order information representing a degree of newness of write. The third unit writes sequentially writes the sequential data at the write address with the order information.
    Type: Application
    Filed: July 27, 2012
    Publication date: August 1, 2013
    Inventors: Takashi OMIZO, Tsutomu OWA, Atsushi KUNIMATSU, Hiroto NAKAI, Masaki MIYAGAWA, Reina NISHINO, Hiroyuki SAKAMOTO
  • PROTECTION METHOD, DECRYPTION METHOD, PLAYER, STORAGE MEDIUM, AND ENCRYPTION APPARATUS OF DIGITAL CONTENT
    Publication number: 20130163755
    Abstract: A digital content protection method includes distributing, together with an encrypted content, an encrypted protected program key, a protected content key, and a protected code including an individual instruction code, at least some elements of which are designed according to a unique operation code specification for each content player or for each content player group.
    Type: Application
    Filed: May 30, 2011
    Publication date: June 27, 2013
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yuji Nagai, Hiroyuki Sakamoto, Hiroto Nakai, Seiji Miyata, Hideki Mimura
  • PATCH BACKING FOR WATER-BASED PASTY PREPARATION
    Publication number: 20130164495
    Abstract: The present invention relates to a backing for a water-based patch consisting of the following constituents, wherein the backing is excellent in pasty preparation retention and moisture retention, improves the persistence of drug efficacy by inhibiting the sublimation of the drug, gives neither restrained feeling nor rough feeling due to a thin thickness and an excellent elasticity, controls the moisture permeability, gives almost no sticky feeling and thereby gives an excellent feeling in application. A patch backing for a water-based pasty preparation consisting of a laminate, wherein the laminate consists of three layers, a film layer having through-holes is laminated between a nonwoven fabric layer A and a nonwoven fabric layer B, said film layer consists of a resin containing an olefin elastomer, the through-hole area per a hole is 0.02-0.18 mm2, and the opening ratio of the through-hole is 1-10%.
    Type: Application
    Filed: July 11, 2011
    Publication date: June 27, 2013
    Applicant: TOYOBO CO., LTD.
    Inventors: Hideo Isoda, Hiroyuki Sakamoto, Takashi Koida, Hiroyasu Sakaguchi, Sadanobu Shirai, Masahiro Inazuki, Miho Ishigure
  • Memory chip having a security function and for which reading and writing of data is controlled by an authenticated controller
    Patent number: 8473810
    Abstract: According to one embodiment, a memory chip, which is connected to a controller that controls reading and writing of data in response to a request from an external device, includes: a memory including a special area that is a predetermined data storage area; a key storage unit that stores therein a second key that corresponds to a first key used by the external device to convert the data; a converting unit that receives, from the controller, data to be written into the special area and generates converted data by converting the data to be written using the second key; and a writing unit that writes the converted data into the special area.
    Type: Grant
    Filed: September 15, 2010
    Date of Patent: June 25, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Toru Kambayashi, Akihiro Kasahara, Shinichi Matsukawa, Hiroyuki Sakamoto, Taku Kato, Hiroshi Sukegawa, Yoshihiko Hirose, Atsushi Shimbo, Koichi Fujisaki