Patents by Inventor Toru Kambayashi
Toru Kambayashi 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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Publication number: 20150188785Abstract: A communication control device includes an extracting unit and an output unit. The extracting unit extracts, from a media key block containing a plurality of elements, partial information that contains elements which can be processed by a communication device having a device ID thereof identified in identification information for identifying one or more device IDs.Type: ApplicationFiled: March 10, 2015Publication date: July 2, 2015Applicant: Kabushiki Kaisha ToshibaInventors: Yoshikazu Hanatani, Toru Kambayashi, Fangming Zhao, Yoshihiro Oba
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Patent number: 9053062Abstract: 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: GrantFiled: June 13, 2014Date of Patent: June 9, 2015Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Toru Kambayashi, Akihiro Kasahara, Shinichi Matsukawa, Hiroyuki Sakamoto, Taku Kato, Hiroshi Sukegawa, Yoshihiko Hirose, Atsushi Shimbo, Koichi Fujisaki
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Patent number: 9025772Abstract: According to one embodiment, an information processing apparatus, which is connected to an external apparatus, includes a device key storage unit, a creating unit, a calculating unit, a communication unit, and a key calculating unit. The device key storage unit stores therein a device key. The creating unit creates a media key from the device key and a media key block. The calculating unit calculates first output information on the basis of first inherent information inherent to the information processing apparatus and public information. The communication unit transmits the first output information to the external apparatus and receives second output information calculated by the external apparatus from the external apparatus. The key calculating unit calculates a shared key shared between the information processing apparatus and the external apparatus on the basis of the media key, the first inherent information, and the second output information.Type: GrantFiled: March 19, 2012Date of Patent: May 5, 2015Assignee: Kabushiki Kaisha ToshibaInventors: Toru Kambayashi, Yoshikazu Hanatani, Yuichi Komano, Yoshihiro Oba, Satoshi Ito, Taku Kato, Yasuro Shobatake
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Publication number: 20150117298Abstract: According to an embodiment, a communication control device is connected to communication devices and includes a storage, a generator, and an output unit. The storage is configured to store group information containing a group ID of a group and device IDs of the communication devices belonging to the group. The generator is configured to generate compressed information in which the device IDs are compressed. The output unit is configured to output, when the group information is updated, to all communication devices identified by the device IDs included in the group information after updating and to a plurality of communication devices including one or more of the communication devices identified by the device IDs not included in the group information after updating, output information containing identification information for identifying the group after updating and compressed information in which the device IDs included in the group information after updating are compressed.Type: ApplicationFiled: January 5, 2015Publication date: April 30, 2015Applicant: Kabushiki Kaisha ToshibaInventors: Yoshikazu HANATANI, Toru KAMBAYASHI, Yoshihiro OBA
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Patent number: 8995045Abstract: According to one embodiment, an image display apparatus includes a light source, a modulation unit, a first array and a second array. The modulation unit modulates intensity and a color of the light to generate beams corresponding to each of modulated pixels included in a modulated pixel group. The first array is formed by juxtaposing a plurality of first deflection elements each having a generating line parallel to a vertical direction of the modulated pixels. The second array is formed by juxtaposing a plurality of second deflection elements each having a generating line tilted by an angle represented by tan?1(?×m/n) with respect to a generating line of the first deflection element.Type: GrantFiled: December 28, 2012Date of Patent: March 31, 2015Assignee: Kabushiki Kaisha ToshibaInventors: Shinichi Tatsuta, Hiroshi Hasegawa, Hideaki Okano, Takahiro Kamikawa, Taisuke Ogoshi, Toru Kambayashi, Shinichi Uehara, Masako Kashiwagi
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Publication number: 20150086010Abstract: In an embodiment, an information processing apparatus is connected to external apparatuses. The information processing apparatus includes: a device key storage unit configured to store a device key; a shared key storage unit configured to store one or more shared keys shared by the external apparatuses; a key generating unit configured to generate a media key from the device key and media key blocks; and an updating unit configured to generate the shared keys as generated shared keys, which is updated, based upon the media key and the shared keys stored in the shared key storage unit, and to store the generated shared keys into the shared key storage unit.Type: ApplicationFiled: December 1, 2014Publication date: March 26, 2015Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Toru KAMBAYASHI, Yoshikazu HANATANI, Atsushi INOUE
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Patent number: 8929541Abstract: In an embodiment, an information processing apparatus is connected to external apparatuses. The information processing apparatus includes: a device key storage unit configured to store a device key; a shared key storage unit configured to store one or more shared keys shared by the external apparatuses; a key generating unit configured to generate a media key from the device key and media key blocks; and an updating unit configured to generate the shared keys as generated shared keys, which is updated, based upon the media key and the shared keys stored in the shared key storage unit, and to store the generated shared keys into the shared key storage unit.Type: GrantFiled: March 27, 2012Date of Patent: January 6, 2015Assignee: Kabushiki Kaisha ToshibaInventors: Toru Kambayashi, Yoshikazu Hanatani, Atsushi Inoue
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Patent number: 8885870Abstract: According to an embodiment, an information processing device includes: an extracting unit configured to extract a feature quantity of a content; a first detecting unit configured to detect a point in the content where variation of the feature quantity is a first predetermined amount or more; a second detecting unit configured to detect components of watermark information including components corresponding to respective intervals based on the point; a determining unit configured to determine a reliability of the watermark information that is detected; and a selecting unit configured to select a first watermark information from the watermark information based on a result of determination determined by the determining unit.Type: GrantFiled: August 11, 2011Date of Patent: November 11, 2014Assignee: Kabushiki Kaisha ToshibaInventors: Tatsuyuki Matsushita, Nakaba Kogure, Fangming Zhao, Kentaro Umesawa, Toru Kambayashi
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Patent number: 8861723Abstract: In general, according to one embodiment, a storage device includes a data storage, a key storage, a receiver, an acquisition unit, a first computing unit, and a second computing unit. The data storage stores therein data. The key storage stores therein a plurality of device keys. The receiver receives identification information on an access device that accesses the data. The acquisition unit acquires an index specifying one of the device keys stored in the key storage. The first computing unit computes a second key based on the device key specified by the index and the identification information, the second key being used to perform an operation on key information acquired by performing an operation on a first key shared with the access device. The second computing unit computes the first key by performing an operation on the key information using the second key.Type: GrantFiled: September 14, 2011Date of Patent: October 14, 2014Assignee: Kabushiki Kaisha ToshibaInventors: Toru Kambayashi, Tatsuyuki Matsushita
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Patent number: 8788907Abstract: 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: GrantFiled: June 24, 2013Date of Patent: July 22, 2014Assignee: Kabushiki Kaisha ToshibaInventors: Toru Kambayashi, Akihiro Kasahara, Shinichi Matsukawa, Hiroyuki Sakamoto, Taku Kato, Hiroshi Sukegawa, Yoshihiko Hirose, Atsushi Shimbo, Koichi Fujisaki
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Publication number: 20140173283Abstract: According to an embodiment, a key management device includes a key exchange processing unit, a transmission unit, and an update unit. The key exchange processing unit is configured to perform a key exchange process for executing an exchange of a shared key together with authentication between the key management device and a communication device. The transmission unit is configured to transmit update information for updating a device key of the communication device authenticated to the communication device, when the communication device has not been authenticated before performing the key exchange process, and not to transmit the update information, otherwise. The update unit is configured to update the device key using the update information, when the communication device has not been authenticated before performing the key exchange process, and not to update the device key, otherwise.Type: ApplicationFiled: December 18, 2013Publication date: June 19, 2014Applicant: Kabushiki Kaisha ToshibaInventors: Yoshikazu HANATANI, Toru KAMBAYASHI, Tatsuyuki MATSUSHITA
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Publication number: 20140129689Abstract: According to an embodiment, a communication device includes a version storage unit, a receiving unit, a determining unit, and a command processing unit. The version storage unit is configured to store therein the first version information. The receiving unit is configured to receive a command including the second version information. The determining unit is configured to determine whether a version represented by the second version information is a next version after a version represented by the first version information. The command processing unit is configured to, based on a determination result of the determining unit and decision information that defines processes corresponding to a command and the determination result, execute processes corresponding to a received command.Type: ApplicationFiled: October 29, 2013Publication date: May 8, 2014Applicant: Kabushiki Kaisha ToshibaInventors: Fangming ZHAO, Yoshikazu Hanatani, Toru Kambayashi, Yoshihiro Oba
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Publication number: 20130290738Abstract: 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: ApplicationFiled: June 24, 2013Publication date: October 31, 2013Inventors: Toru KAMBAYASHI, Akihiro Kasahara, Shinichi Matsukawa, Hiroyuki Sakamoto, Taku Kato, Hiroshi Sukegawa, Yoshihiko Hirose, Atsushi Shimbo, Koichi Fujisaki
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Publication number: 20130258446Abstract: According to one embodiment, an image display apparatus includes a light source, a modulation unit, a first array and a second array. The modulation unit modulates intensity and a color of the light to generate beams corresponding to each of modulated pixels included in a modulated pixel group. The first array is formed by juxtaposing a plurality of first deflection elements each having a generating line parallel to a vertical direction of the modulated pixels. The second array is formed by juxtaposing a plurality of second deflection elements each having a generating line tilted by an angle represented by tan?1(?×m/n) with respect to a generating line of the first deflection element.Type: ApplicationFiled: December 28, 2012Publication date: October 3, 2013Inventors: Shinichi TATSUTA, Hiroshi Hasegawa, Hideaki Okano, Takahiro Kamikawa, Taisuke Ogoshi, Toru Kambayashi, Shinichi Uehara, Masako Kashiwagi
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Publication number: 20130259227Abstract: According to an embodiment, an information-processing device is coupled to an external device and a server. The information-processing device includes a device key storage configured to store a device key; and an MKB processor configured to generate a media key from the device key and a media key block. The information-processing device also includes a shared key generator configured to generate a shared key from the media key and secret information transmitted from the server. The shared key is shared by the information-processing device and the external device.Type: ApplicationFiled: December 21, 2012Publication date: October 3, 2013Inventors: Yoshikazu HANATANI, Toru KAMBAYASHI, Masahiro ISHIYAMA
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Patent number: 8548169Abstract: A communication apparatus that encrypts a plurality of pieces that constitute a part of data and transmits the encrypted pieces stores an encrypted piece that is one of the pieces encrypted by another communication apparatus, and first decryption key information used for decrypting the encrypted piece, while keeping the encrypted piece and the first decryption key information in correspondence with each other. Further, the communication apparatus generates temporary information that can be different at each time of generation, further performs an encrypting process on the encrypted piece based on the temporary information, and outputs a new encrypted piece. The communication apparatus transmits the new encrypted piece, the first decryption key information that is stored in correspondence with the encrypted piece, and second decryption key information used for decrypting the encrypting process.Type: GrantFiled: March 11, 2009Date of Patent: October 1, 2013Assignee: Kabushiki Kaisha ToshibaInventors: Toru Kambayashi, Tatsuyuki Matsushita, Haruhiko Toyama, Toshinori Odaka
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Patent number: 8478108Abstract: An apparatus determines whether a combination of a certificate type of a content certificate recorded on a source recording medium and a medium type of the source recording medium is a proper combination. If the combination is a proper combination, the apparatus requests a license server, which is connected to the apparatus via a network, to give approval to record content on a target recording medium. If the apparatus is a legitimate DVD recorder, the license server sends to the content recording apparatus a content certificate including on the source recording medium as the certificate type. The apparatus records the content together with the received content certificate on the target recording medium.Type: GrantFiled: March 6, 2012Date of Patent: July 2, 2013Assignee: Kabushiki Kaisha ToshibaInventors: Hiroshi Isozaki, Atsushi Ishihara, Taku Kato, Toru Kambayashi, Shinichi Matsukawa
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Patent number: 8473810Abstract: 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: GrantFiled: September 15, 2010Date of Patent: June 25, 2013Assignee: Kabushiki Kaisha ToshibaInventors: Toru Kambayashi, Akihiro Kasahara, Shinichi Matsukawa, Hiroyuki Sakamoto, Taku Kato, Hiroshi Sukegawa, Yoshihiko Hirose, Atsushi Shimbo, Koichi Fujisaki
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Publication number: 20130081144Abstract: According to an embodiment, a storage device connected to an external device includes a data storage, a key storage, a random number generating unit, a random number storage, a random number transmitting unit, a data receiving unit, a calculating unit, a determining unit, and a storage control unit. The data receiving unit receives write data to be written into the data storage and first authentication information. The key storage stores a key. The calculating unit calculates second authentication information for data generated from the write data and the random number by using the key. The determining unit determines whether the first authentication information and the second authentication information are identical. The storage control unit stores the write data into the data storage when the first authentication information and the second authentication information are determined to be identical.Type: ApplicationFiled: June 29, 2012Publication date: March 28, 2013Applicant: Kabushiki Kaisha ToshibaInventor: Toru KAMBAYASHI
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Publication number: 20130022196Abstract: In an embodiment, an information processing apparatus is connected to external apparatuses. The information processing apparatus includes: a device key storage unit configured to store a device key; a shared key storage unit configured to store one or more shared keys shared by the external apparatuses; a key generating unit configured to generate a media key from the device key and media key blocks; and an updating unit configured to generate the shared keys as generated shared keys, which is updated, based upon the media key and the shared keys stored in the shared key storage unit, and to store the generated shared keys into the shared key storage unit.Type: ApplicationFiled: March 27, 2012Publication date: January 24, 2013Applicant: Kabushiki Kaisha ToshibaInventors: Toru Kambayashi, Yoshikazu Hanatani, Atsushi Inoue