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).

  • Storage system in which fictitious information is prevented
    Patent number: 8990530
    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: Grant
    Filed: February 28, 2013
    Date of Patent: March 24, 2015
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yuji Nagai, Yasufumi Tsumagari, Shinichi Matsukawa, Hiroyuki Sakamoto, Hideki Mimura
  • Storage system in which fictitious information is prevented
    Patent number: 8959615
    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: Grant
    Filed: February 25, 2013
    Date of Patent: February 17, 2015
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yuji Nagai, Yasufumi Tsumagari, Shinichi Matsukawa, Hiroyuki Sakamoto, Hideki Mimura
  • NICKEL-HYDROGEN STORAGE BATTERY
    Publication number: 20150044562
    Abstract: A nickel-hydrogen storage battery includes a positive electrode, a negative electrode using an AB5 based hydrogen-absorbing alloy, and a separator arranged between the positive and negative electrodes. The AB5 based hydrogen-absorbing alloy includes an A element, which is a constituent element of a misch metal, and a B element, which includes nickel and cobalt. The ratio of the amount of substance of the B element to that of the A element is 5.2 or more and 5.4 or less. The ratio of the amount of substance of cobalt to that of the A element is 0.15 or more and 0.4 or less. The liquid retention volume (V1) and the true volume (V2) of the separator, the theoretical capacity of the negative electrode (C1), and the theoretical capacity of the positive electrode (C2) satisfy the following expression. 2.0?V1/V2×C1/C2?3.
    Type: Application
    Filed: March 25, 2014
    Publication date: February 12, 2015
    Applicant: PRIMEARTH EV ENERGY CO., LTD.
    Inventors: Shinichiro ITO, Yuki SAKITO, Hiroyuki SAKAMOTO, Katsumi KASHIWAGI
  • Content data reproduction system and collection system of use history thereof
    Patent number: 8929547
    Abstract: According to one embodiment, a content data reproduction system includes a host device which uses content data, and a storage device configured such that content data, which is obtained by decrypting encrypted content data that is created by encrypting the content data by content key data, is made usable in the host device. The host device includes a device ID which is uniquely allocated to each of host devices. The storage device includes a memory and a controller configured to control the memory.
    Type: Grant
    Filed: March 19, 2012
    Date of Patent: January 6, 2015
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Shinichi Matsukawa, Akira Miura, Hiroshi Suu, Hiroyuki Sakamoto, Akihiro Kasahara
  • Storage system in which fictitious information is prevented
    Patent number: 8874917
    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: Grant
    Filed: December 31, 2012
    Date of Patent: October 28, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yuji Nagai, Yasufumi Tsumagari, Shinichi Matsukawa, Hiroyuki Sakamoto, Hideki Mimura
  • MEMORY CHIP
    Publication number: 20140298043
    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 13, 2014
    Publication date: October 2, 2014
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Toro Kambayashi, Akihiro Kasahara, Shinichi Matsukawa, Hiroyuki Sakamoto, Taku Kato, Hiroshi Sukegawa, Yoshihiko Hirose, Atsushi Shimbo, Koichi Fujisaki
  • STORAGE SYSTEM IN WHICH FICTITIOUS INFORMATION IS PREVENTED
    Publication number: 20140245021
    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: February 27, 2013
    Publication date: August 28, 2014
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Yuji NAGAI, Yasufumi TSUMAGARI, Shinichi MATSUKAWA, Hiroyuki SAKAMOTO, Hideki MIMURA
  • STORAGE SYSTEM IN WHICH FICTITIOUS INFORMATION IS PREVENTED
    Publication number: 20140244956
    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: February 26, 2013
    Publication date: August 28, 2014
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Yuji NAGAI, Yasufumi Tsumagari, Shinichi Matsukawa, Hiroyuki Sakamoto, Hideki Mimura
  • STORAGE SYSTEM IN WHICH FICTITIOUS INFORMATION IS PREVENTED
    Publication number: 20140245427
    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: February 25, 2013
    Publication date: August 28, 2014
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Yuji Nagai, Yasufumi Tsumagari, Shinichi Matsukawa, Hiroyuki Sakamoto, Hideki Mimura
  • STORAGE SYSTEM IN WHICH FICTITIOUS INFORMATION IS PREVENTED
    Publication number: 20140244957
    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: February 28, 2013
    Publication date: August 28, 2014
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Yuji NAGAI, Yasufumi Tsumagari, Shinichi Matsukawa, Hiroyuki Sakamoto, Hideki Mimura
  • Content data distribution system, content data delivery method, and semiconductor device
    Patent number: 8818268
    Abstract: In this content data delivery method, content data is transmitted from a content server to a first semiconductor device through a network. Then, the content data, content ID identifying the content data, and route data showing a route through which the content data is transmitted are transmitted from the first semiconductor device to a second semiconductor device using close-proximity wireless communication. Thereafter, the content ID and the route data are transmitted from the second semiconductor device to the content server. In addition, based on the route data, a reward corresponding to the content ID is calculated for the first semiconductor device, and the reward is provided to the first semiconductor device.
    Type: Grant
    Filed: March 21, 2012
    Date of Patent: August 26, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tsukasa Matoba, Shinichi Matsukawa, Akihiro Kasahara, Hiroyuki Sakamoto
  • ALKALINE STORAGE BATTERY CATHODE, METHOD FOR MANUFACTURING ALKALINE STORAGE BATTERY CATHODE, ALKALINE STORAGE BATTERY, METHOD FOR MANUFACTURING ALKALINE STORAGE BATTERY, ALKALINE STORAGE BATTERY CATHODE ACTIVE MATERIAL, AND METHOD FOR MANUFACTURING ALKALINE STORAGE BATTERY CATHODE ACTIVE MATERIAL
    Publication number: 20140205906
    Abstract: This alkaline storage battery cathode is provided with: nickel hydroxide particles covered by a cobalt-compound coating layer; a zinc compound; and an yttrium compound and/or an ytterbium compound. The zinc compound and the yttrium compound and/or ytterbium compound are blended at a blend ratio that is in accordance with the ratio of the capacity characteristics of the alkaline storage battery and the output characteristics of the alkaline storage battery.
    Type: Application
    Filed: April 11, 2012
    Publication date: July 24, 2014
    Applicant: PRIMEARTH EV ENERGY CO., LTD.
    Inventors: So Kudo, Kenichi Maehara, Sachio Takeda, Kazuhiro Ookawa, Satoru Takehara, Hiroyuki Sakamoto
  • Memory chip for converting data received from controller controlling reading and writing of data
    Patent number: 8788907
    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: June 24, 2013
    Date of Patent: July 22, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Toru Kambayashi, Akihiro Kasahara, Shinichi Matsukawa, Hiroyuki Sakamoto, Taku Kato, Hiroshi Sukegawa, Yoshihiko Hirose, Atsushi Shimbo, Koichi Fujisaki
  • Device and memory system for swappable memory
    Patent number: 8738851
    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: Grant
    Filed: May 9, 2013
    Date of Patent: May 27, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Atsushi Kunimatsu, Hiroto Nakai, Hiroyuki Sakamoto, Kenichi Maeda
  • Storage system in which fictitious information is prevented
    Patent number: 8732470
    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: Grant
    Filed: September 20, 2012
    Date of Patent: May 20, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yuji Nagai, Yasufumi Tsumagari, Shinichi Matsukawa, Hiroyuki Sakamoto, Hideki Mimura
  • AUTHENTICATOR, AUTHENTICATEE AND AUTHENTICATION METHOD
    Publication number: 20140075190
    Abstract: According to one embodiment, an authenticatee includes, a memory configured to store secret information XY, secret information XY which is created by multiply duplicating, at least twice, the secret information XY, and secret information XYE, 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 calculated operation with respect to at least a part of 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 calculated result Z from the data ? and the data C.
    Type: Application
    Filed: September 26, 2011
    Publication date: March 13, 2014
    Inventors: Yuji Nagai, Taku Kato, Hiroyuki Sakamoto
  • HOST APPARATUS AND MEMORY DEVICE
    Publication number: 20140059273
    Abstract: According to one embodiment, a host apparatus is capable of accessing memory device. The host apparatus includes application software, a dedicated file system, and an interface circuit. The application software issues, to a file system, a request for access to the memory device. The dedicated file system manages a memory area of the memory device in accordance with a method appropriate to a flash memory in response to the access request. The dedicated file system manages logical address spaces by predetermined unit areas, and sequentially writes data into one of reserved unit areas. The application software issues the access request to the dedicated file system without recognizing a size of the unit area.
    Type: Application
    Filed: March 1, 2013
    Publication date: February 27, 2014
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Akihisa FUJIMOTO, Hiroyuki Sakamoto, Shinichi Matsukawa, Jun Sato
  • AUTHENTICATOR, AUTHENTICATEE AND AUTHENTICATION METHOD
    Publication number: 20140052988
    Abstract: According to one embodiment, an authenticatee includes, a memory configured to store secret information XYmain, XYsub, and secret information XYmainE, XYsubE, 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 generation module configured to generate secret information XY based on the secret information XYmain, XYsub loaded from the memory, a calculating module configured to generate data C by executing a compression calculated operation with respect to at least a part of the random number D and the secret information XY, a generation module configured to generate data ?, and a bit-by-bit addition module configured to calculate an calculated result Z from the data ? and the data C.
    Type: Application
    Filed: September 26, 2011
    Publication date: February 20, 2014
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Yuji Nagai, Taku Kato, Hiroyuki Sakamoto
  • 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