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).
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Patent number: 9501399Abstract: 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: GrantFiled: August 2, 2013Date of Patent: November 22, 2016Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Takashi Wakutsu, Shuichi Sakurai, Kuniaki Ito, Yasufumi Tsumagari
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Publication number: 20160299696Abstract: 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: ApplicationFiled: June 21, 2016Publication date: October 13, 2016Applicant: Kabushiki Kaisha ToshibaInventors: Takashi WAKUTSU, Shuichi SAKURAI, Kuniaki ITO, Yasufumi TSUMAGARI
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Patent number: 9454495Abstract: According to one embodiment, a memory system includes an application module, a storage module, and a control module. The storage module stores user data, application software configured to control operation of the application module, and management information used to manage the user data and the application software. The control module controls writing and erasing of the storage module. The control module masks information indicating an access-prohibited area included in the management information read from the storage module, the access-prohibited area includes the application software.Type: GrantFiled: September 18, 2011Date of Patent: September 27, 2016Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Shuichi Sakurai, Takashi Wakutsu, Kuniaki Ito, Yasufumi Tsumagari
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Patent number: 9449193Abstract: According to one embodiment, an information processing apparatus includes a nonvolatile semiconductor memory and a processor. The nonvolatile semiconductor memory stores identification information. The processor controls an application which executes authentication processing for authenticating validation of the identification information stored in the nonvolatile semiconductor memory. The processor executes the application to read the identification information from the nonvolatile semiconductor memory, and to execute the authentication processing for determining whether or not the identification information is authentic. When the identification information is authentic, the processor continues at least some processes of the application, and when the identification information is inauthentic, the processor ends at least some processes of the application.Type: GrantFiled: February 25, 2014Date of Patent: September 20, 2016Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Shinichi Matsukawa, Yasufumi Tsumagari, Yuji Nagai
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Patent number: 9418022Abstract: 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: GrantFiled: October 2, 2012Date of Patent: August 16, 2016Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Yuji Nagai, Yasufumi Tsumagari, Shinichi Matsukawa, Hiroyuki Sakamoto, Hideki Mimura
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Publication number: 20160036937Abstract: According to one embodiment, a memory system includes a non-volatile semiconductor memory device, a control unit, a memory as a work area, a wireless communication module, and an extension register. The control unit controls the non-volatile semiconductor memory device. The extension register is provided in the memory and has a data length by which a wireless communication function of the wireless communication module can be defined. The control unit causes the non-volatile semiconductor memory device to store, as a file, an HTTP request supplied from a host, causes the extension register, based on a first command supplied from the host, to register an HTTP transmission command transmitted together with the first command, and causes the wireless communication module to transmit the HTTP request stored in the non-volatile semiconductor memory device based on the transmission command registered in the extension register.Type: ApplicationFiled: October 16, 2015Publication date: February 4, 2016Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Kuniaki ITO, Yasufumi TSUMAGARI, Takashi WAKUTSU, Shuichi SAKURAI
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Patent number: 9204477Abstract: 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: GrantFiled: March 19, 2013Date of Patent: December 1, 2015Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Yasufumi Tsumagari, Kuniaki Ito, Takashi Wakutsu, Shuichi Sakurai
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Publication number: 20150341345Abstract: A security system includes a controller manufacturer, a key issuer, and a medium manufacturer. The controller manufacturer writes a controller key Kc and a controller unique ID (IDcu) in the controller at the time of manufacturing the controller, and transmits the controller key Kc to the key issuer. The key issuer generates a medium device key Kmd_i and a medium device key certificate Certmedia, and encrypts the medium device key Kmd_i using the controller key Kc to generate encrypted medium device key Enc (Kc, Kmd_i). The medium manufacturer decrypts the encrypted medium device key Enc (Kc, Kmd_i) received from the key issuer, using the controller key Kc in the controller, and encrypts the medium device key Kmd_i obtained by decryption using a controller unique key Kcu generated from the controller unique ID (IDcu) in the controller, and then store it in a memory.Type: ApplicationFiled: August 4, 2015Publication date: November 26, 2015Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Yuji NAGAI, Taku Kato, Tatsuyuki Matsushita, Shinichi Matsukawa, Yasufumi Tsumagari
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Publication number: 20150326397Abstract: A first data generation unit generates identification key information (FKey) that may be decrypted from the identification key information (IDKey) using key management information (FKB) read from an authenticatee. A decryption unit decrypts encrypted secret identification information (E-SecretID) using the identification key information (FKey) to generate secret identification information (SecretID). A second data generation unit generates a first session key (Skey) using the first key information (Hkey) and a random number. A one-way conversion unit performs a one-way conversion process on the secret identification information (SecretID) using the generated first session key (SKey) to generate first one-way conversion data (Oneway-ID).Type: ApplicationFiled: July 17, 2015Publication date: November 12, 2015Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Yuji NAGAI, Taku KATO, Tatsuyuki MATSUSHITA, Shinichi MATSUKAWA, Yasufumi TSUMAGARI
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Patent number: 9124432Abstract: A first data generation unit generates identification key information (FKey) that may be decrypted from the identification key information (IDKey) using key management information (FKB) read from an authenticatee. A decryption unit decrypts encrypted secret identification information (E-SecretID) using the identification key information (FKey) to generate secret identification information (SecretID). A second data generation unit generates a first session key (Skey) using the first key information (Hkey) and a random number. A one-way conversion unit performs a one-way conversion process on the secret identification information (SecretID) using the generated first session key (SKey) to generate first one-way conversion data (Oneway-ID).Type: GrantFiled: May 25, 2012Date of Patent: September 1, 2015Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Yuji Nagai, Taku Kato, Tatsuyuki Matsushita, Shinichi Matsukawa, Yasufumi Tsumagari
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Publication number: 20150096058Abstract: According to one embodiment, an information processing apparatus includes a nonvolatile semiconductor memory and a processor. The nonvolatile semiconductor memory stores identification information. The processor controls an application which executes authentication processing for authenticating validation of the identification information stored in the nonvolatile semiconductor memory. The processor executes the application to read the identification information from the nonvolatile semiconductor memory, and to execute the authentication processing for determining whether or not the identification information is authentic. When the identification information is authentic, the processor continues at least some processes of the application, and when the identification information is inauthentic, the processor ends at least some processes of the application.Type: ApplicationFiled: February 25, 2014Publication date: April 2, 2015Applicant: Kabushiki Kaisha ToshibaInventors: Shinichi MATSUKAWA, Yasufumi Tsumagari, Yuji Nagai
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Patent number: 8990482Abstract: 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: GrantFiled: September 5, 2012Date of Patent: March 24, 2015Assignee: Kabushiki Kaisha ToshibaInventors: Kuniaki Ito, Takashi Wakutsu, Yasufumi Tsumagari, Shuichi Sakurai
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Patent number: 8990454Abstract: 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: GrantFiled: September 5, 2012Date of Patent: March 24, 2015Assignee: Kabushiki Kaisha ToshibaInventors: Kuniaki Ito, Takashi Wakutsu, Yasufumi Tsumagari, Shuichi Sakurai
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Patent number: 8990530Abstract: 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: GrantFiled: February 28, 2013Date of Patent: March 24, 2015Assignee: Kabushiki Kaisha ToshibaInventors: Yuji Nagai, Yasufumi Tsumagari, Shinichi Matsukawa, Hiroyuki Sakamoto, Hideki Mimura
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Publication number: 20150074421Abstract: A security system includes a controller manufacturer, a key issuer, and a medium manufacturer. The controller manufacturer writes a controller key Kc and a controller unique ID (IDcu) in the controller at the time of manufacturing the controller, and transmits the controller key Kc to the key issuer. The key issuer generates a medium device key Kmd_i and a medium device key certificate Certmedia, and encrypts the medium device key Kmd_i using the controller key Kc to generate encrypted medium device key Enc(Kc, Kmd_i). The medium manufacturer decrypts the encrypted medium device key Enc(Kc, Kmd_i) received from the key issuer, using the controller key Kc in the controller, and encrypts the medium device key Kmd_i obtained by decryption using a controller unique key Kcu generated from the controller unique ID (IDcu) in the controller, and then store it in a memory.Type: ApplicationFiled: May 25, 2012Publication date: March 12, 2015Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Yuji Nagai, Taku Kato, Tatsuyuki Matsushita, Shinichi Matsukawa, Yasufumi Tsumagari
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Publication number: 20150074394Abstract: A first data generation unit generates identification key information (FKey) that may be decrypted from the identification key information (IDKey) using key management information (FKB) read from an authenticatee. A decryption unit decrypts encrypted secret identification information (E-SecretID) using the identification key information (FKey) to generate secret identification information (SecretID). A second data generation unit generates a first session key (Skey) using the first key information (Hkey) and a random number. A one-way conversion unit performs a one-way conversion process on the secret identification information (SecretID) using the generated first session key (SKey) to generate first one-way conversion data (Oneway-ID).Type: ApplicationFiled: May 25, 2012Publication date: March 12, 2015Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Yuji Nagai, Taku Kato, Tatsuyuki Matsushita, Shinichi Matsukawa, Yasufumi Tsumagari
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Publication number: 20150074406Abstract: For authentication of the host device, the memory device is configured to output the encrypted second key information (FKB) to the host device, output the encrypted identification information (E-SecretID) to the host device, generate third third key information (Hkey) using information (HC) received from the host device and the first key information, generate a session key (Skey) using a random number (RN) received from the host device, and the third key information, generate authentication information (Oneway-ID) by performing a one-way conversion process on the identification information, using the session key, and output the authentication information (Oneway-ID) to the host device.Type: ApplicationFiled: May 25, 2012Publication date: March 12, 2015Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Yuji Nagai, Taku Kato, Tatsuyuki Matsushita, Shinichi Matsukawa, Yasufumi Tsumagari
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Patent number: 8959615Abstract: 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: GrantFiled: February 25, 2013Date of Patent: February 17, 2015Assignee: Kabushiki Kaisha ToshibaInventors: Yuji Nagai, Yasufumi Tsumagari, Shinichi Matsukawa, Hiroyuki Sakamoto, Hideki Mimura
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Patent number: 8874917Abstract: 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: GrantFiled: December 31, 2012Date of Patent: October 28, 2014Assignee: Kabushiki Kaisha ToshibaInventors: Yuji Nagai, Yasufumi Tsumagari, Shinichi Matsukawa, Hiroyuki Sakamoto, Hideki Mimura
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Publication number: 20140245427Abstract: 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: ApplicationFiled: February 25, 2013Publication date: August 28, 2014Applicant: Kabushiki Kaisha ToshibaInventors: Yuji Nagai, Yasufumi Tsumagari, Shinichi Matsukawa, Hiroyuki Sakamoto, Hideki Mimura