Patents by Inventor Yasufumi Tsumagari

Yasufumi Tsumagari 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).

  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • Publication number: 20140006738
    Abstract: A method of authenticating a memory device by a host device, wherein the memory device, a memory device controller, a memory card containing the memory device and the controller, and the host device are manufactured by a memory device manufacturer, a controller manufacturer, a memory card manufacturer, and a host device manufacturer, respectively. The memory device comprises a first area, a second area for storing key index information, which is written by the memory device manufacturer before shipping the memory device, and a third area for storing a set of encrypted keys whose index corresponds to the key index information, which is written by the memory device manufacturer before shipping the memory device. After the memory device is shipped, the first area is not readable or writable by the controller, the second area readable but not writable by the controller, and the third area readable and writable by the controller.
    Type: Application
    Filed: June 29, 2012
    Publication date: January 2, 2014
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Yuji NAGAI, Taku KATO, Tastuyuki MATSUSHITA, Shinichi MATSUKAWA, Yasufumi TSUMAGARI
  • Patent number: 8601149
    Abstract: According to one embodiment, an information storage medium, and the program comprises referring to a manifest from a playlist that manages playback presentation of a playback presentation object, referring to one of a markup and a script from the manifest, monitoring defining of a name corresponding to an event in the markup, and generation of an event in response to the name corresponding to the event defined in the markup using an event listener in the script, and designating function contents that execute processing when the event is generated.
    Type: Grant
    Filed: May 29, 2012
    Date of Patent: December 3, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hideo Ando, Eita Shuto, Yasufumi Tsumagari, Haruhiko Toyama, Takero Kobayashi
  • Publication number: 20130318282
    Abstract: According to one embodiment, a memory system includes a nonvolatile semiconductor memory device, controller, memory, wireless communication function section, and extension register. The controller controls the nonvolatile semiconductor memory device. The memory is serving as a work area of the controller. The wireless communication module has a wireless communication function. The extension register is provided in the memory. The controller processes a first command to read data from the extension register, and a second command to write data to the extension register. The extension register records, an information specifying the type of the wireless communication function in a specific page, and an address information indicating a region on the extension register to which the wireless communication function is assigned.
    Type: Application
    Filed: August 2, 2013
    Publication date: November 28, 2013
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Takashi WAKUTSU, Shuichi Sakurai, Kuniaki Ito, Yasufumi Tsumagari
  • Publication number: 20130315564
    Abstract: An embodiment may allow not only information management of contents which are to be recorded and played back by the user but also information management which has affinity for contents distributed by contents providers. An information storage medium may have a file structure that manages first high-definition video information which can be recorded by the user and second high-definition video information which can be provided by a contents provider. The management area is configured to include management information used to manage playback of the digital stream signal including the second high-definition video information.
    Type: Application
    Filed: July 31, 2013
    Publication date: November 28, 2013
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Shinichi KIKUCHI, Masahiro NAKASHIKA, Yasufumi TSUMAGARI
  • Publication number: 20130282794
    Abstract: According to one embodiment, there is provided a data processing method. The method includes reading management information indicative of a playback and display procedure, acquiring a content from a certain storage position at a timing determined based on the management information, and performing playback and display of the content at a timing determined based on the management information.
    Type: Application
    Filed: March 15, 2013
    Publication date: October 24, 2013
    Inventors: Hideo ANDO, Haruhiko Toyama, Takero Kobayashi, Yasufumi Tsumagari
  • Publication number: 20130272284
    Abstract: According to one embodiment, a memory device includes a nonvolatile semiconductor memory, a control unit and a wireless communication unit. The control unit controls the nonvolatile semiconductor memory. The wireless communication unit includes a wireless communication function and is controlled by the control unit. The control unit includes a first control mode to control the wireless communication unit in accordance with set information when a control command to control the wireless communication unit is not received within a predetermined time. The control unit includes a second control mode to control the wireless communication unit in accordance with the control command when the control command is received within the predetermined time.
    Type: Application
    Filed: March 19, 2013
    Publication date: October 17, 2013
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yasufumi Tsumagari, Kuniaki Ito, Takashi Wakutsu, Shuichi Sakurai
  • Publication number: 20130268802
    Abstract: An aspect of the present embodiment, there is provided a memory system including a nonvolatile memory area, a first interface be connected to a first host device, a second interface connected to a second host device, and a controller controlling the first interface such that the first device is configured to prohibit to write data into the nonvolatile memory area on a basis of a command provided from the second host device before the second host device writes data into the nonvolatile memory area through the second interface, wherein the first interface notices an error to the first host device when the first device writes data into the nonvolatile memory area, and the second host device transmits data from an portion not to be written in the nonvolatile memory area to the first host.
    Type: Application
    Filed: September 5, 2012
    Publication date: October 10, 2013
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Kuniaki ITO, Takashi Wakutsu, Yasufumi Tsumagari, Shuichi Sakurai
  • Publication number: 20130268720
    Abstract: A memory system includes a nonvolatile memory area including a first area in which write-in and read-out actions on data are performed and a second area in which such actions are prohibited, first and second interfaces, and a controller configured to connect to a second host using a first wireless communication configuration when the controller determines a second wireless communication configuration to connect to the second host device is not retained in the first area, the controller controlling the first interface in so that the first host device writes data into the memory area on a basis of a command provided from the second host device. When the controller changes the first wireless communication configuration, the controller connects to the second host device using the second wireless communication configuration, and the first interface notifies an error to the first host device not to write data into the memory area.
    Type: Application
    Filed: September 5, 2012
    Publication date: October 10, 2013
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Kuniaki ITO, Takashi WAKUTSU, Yasufumi TSUMAGARI, Shuichi SAKURAI
  • Publication number: 20130230298
    Abstract: According to one embodiment, there is provided a data processing method. The method includes reading management information indicative of a playback and display procedure, acquiring a content from a certain storage position at a timing determined based on the management information, and performing playback and display of the content at a timing determined based on the management information.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 5, 2013
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Hideo ANDO, Haruhiko TOYAMA, Takero KOBAYASHI, Yasufumi TSUMAGARI
  • Patent number: 8521000
    Abstract: According to one embodiment, there is provided an information playback method, comprising reading out management information used to manage one or more video titles from an information storage medium, the medium storing an advanced content including the management information in which a title timeline indicating playback timings of objects of each video title being individually defined, and playing back objects of each video title in accordance with the title timeline defined in the readout management information.
    Type: Grant
    Filed: June 22, 2006
    Date of Patent: August 27, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hideo Ando, Yasufumi Tsumagari, Takero Kobayashi, Haruhiko Toyama