Kabushiki Kaisha Toshiba

Canon Kabushiki Kaisha

Sony Corporation

Hitachi, Ltd.

Fuji Photo Film Company, Limited

Asahi Rubber Inc.

Toshiba Energy Systems & Solutions Corporation

Jfe Steel Corporation

Mitsubishi Power, Ltd.

Hitachi Microcomputer System, Ltd.

Hokutaku Co., Ltd.

Hideaki Sato

Yoshimichi Tanizawa

Haruhiko Toyama

Toshibumi Seki

Kenichiro Yoshii

Yasuhiro Kimura

Takayuki Miyazawa

Ririka Takahashi

Tatsunori Kanai

Hideki Yoshida

Shinichi Kanno

Shigehiro Asano

Shinichi Kawamura

Kazuhiro Fukutomi

Takeshi Goshima

Takao Tsuji

Kimio Kono

Yoshinori Sugiura

Kiyonobu Endo

Kazuo Hoshito

Toshimitsu Kaneko

Hiroshi Yoshikawa

Shinya Murai

Sachio Iida

Takashi Kitamura

Toshinari Takahashi

Takeshi Nakamine

Tooru Kamibayashi

Kazuaki Doi

Koichi Masegi

Akira Murakami

Shinichi Baba

Norio Shimo

Nobuyoshi Watanabe

Kazuhiko Taira

Hideki Mimura

Morio Yagihara

Taku Kato

Satoshi Ito

Nobuo Seto

Ryota Kitagawa

Tatsuyuki Matsushita

Yasufumi Tsumagari

Takashi Usui

Toshio Kawagishi

Toru Kambayashi

Yasuhiro Ishibashi

Takehiko Kiyohara

Kazuya Matsumoto

Yoshitsune Sugano

Toshitami Hara

Tetsuo Hasegawa

Kenji Komori

Akira Ichikawa

Hideki Matsumoto

Shinji Shibuya

Osamu Uchida

Yoshiaki Shirato

Norihiro Yoshinaga

Kentaro Umesawa

Satoshi Endo

Yasuaki Deguchi

Toshihiko Myojo

Seiichi Nakamura

Isao Yamaguchi

Hajime Nakagawa

Asao Watanabe

Masataka Wakamatsu

Motofumi Tanaka

Yoshimi Iso

Masutsugu Tasaki

Hiroyuki Yasui

Akira Shinmi

Masahiro Asayama

Toshiki Osako

Takashi Anyashiki

Sadasuke Kurahayashi

Tetsuharu Tanoue

Hisaki Hiraiwa

Hidekazu Fujimoto

Takeshi Sato

Takero Kobayashi

Eita Shuto

Shinichi Tanabe

Hideo Morohashi

Ryuiti Koike

Yoshioki Hajimoto

Nobuhiro Imai

Tetsuya Hattori

Mamiko Kujiraoka

Kenichi Yamazaki

Yutaka Watanabe

Alex Dixon

Takashi Moriyasu

Masahisa Fukui

Takayuki Motoyanagi

Kazuyuki Saijo

Yoichiro Yamagata

Kazuhiro Fujimura

Hiroshi Kaibe

According to an embodiment, a quantum cryptographic device includes a memory and one or more processors coupled to the memory. The one or more processors are configured to: tabulate information on an application key transmitted and received by using a quantum cryptographic key and output an application-key information tabulation result; calculate a unit price of the application key based on the application-key information tabulation result; and display information that is display information including the unit price of the application key.

Quantum cryptographic device, quantum cryptographic communication fee calculation system, and quantum cryptographic communication fee calculation method

An electrochemical reaction device of an embodiment includes: an electrochemical reaction cellthat includes: a first electrode having a first flow path, a second electrode having a second flow path, and a separating membrane sandwiched between the first electrode and the second electrode; a liquid tank that contains a liquid to be treated supplied to the second flow path of the second electrode; a first pipe that connects an inlet of the second flow path and the liquid tank; a second pipe that connects an outlet of the second flow path and the liquid tank; and a backflow suppression mechanism that is provided in the second pipe to prevent backflow of the liquid to be treated flowing in the second pipe or reduce a backflow speed.

Electrochemical reaction device and electrochemical reaction method

A bonded body wherein functional base material is attached to object to be bonded. Functional base material and object are bonded with functional base material's end portion covered so operational effect neither lost nor adversely affected by fluid, bonded body has strong bonding property preventing functional base material peeled off due to weather. Peelability allows functional base material repair ease. Functional base material provided on object's curved surface to be bonded to along curved and/or smooth surface of object to be bonded to along smooth surface. Functional base material has peripheral side surface with peripheral distal-most end portion. Peripheral gap part provided between object to be bonded to and functional base material on inside of peripheral distal-most end portion and on side opposing to object to be bonded to. Peripheral gap part filled with holding member extending in laminar fan shape from peripheral side surface along curved and/or smooth surface.

Bonded body of object to be bonded to and functional base material

An airflow generation device having a first dielectric substrate made from a rubber elastic material, a first electrode on or near by a first surface of the first dielectric substrate, a second electrode on a second surface, and a second dielectric substrate made from a rubber elastic material covering the second electrode. It makes the airflows generated by plasma caused from partial gas near by the first surface through applied voltage into the first electrode and the second electrode, and bonding portions between the first electrode and the second electrode and the first dielectric substrate, bonding portions between the second electrode and the second dielectric substrate, and bonding portions between the first dielectric substrate and the second dielectric substrate are bonded by chemical bonds with chemically crosslinking.

Airflow generation device and manufacturing method for same

A set screw () is provided, which has a screw main body (), a male thread portion () which is formed on an outer periphery of the screw main body (), and a drain hole () which penetrates a central portion of the screw main body () in an extension direction of the screw main body (). The blade root ring () has a hole () which extends radially outward from an inner peripheral surface () of the blade root ring (), and a female thread portion () which is formed on an inner peripheral surface () of the hole (), and the set screw () is screwed into the female thread portion ().

Stator blade segment and steam turbine

According to an embodiment, a quantum key distribution device includes first and second operation units. The first operation unit is configured to perform a first operation as a key distillation operation. The first operation unit includes a hardware circuit for performing a part of the first operation. The key distillation operation includes a sifting operation for a photon bit string generated through quantum key distribution with another quantum key distribution device via a quantum communication channel. The second operation unit is configured to perform a second operation as a key distillation operation other than the first operation. The second operation unit includes a circuit for a part of the second operation. The first operation unit stores intermediate data generated by the first operation. The second operation unit generates, by the second operation, a cryptographic key being the same as for the another quantum key distribution device from the intermediate data.

Quantum key distribution device, quantum key distribution system, and quantum key distribution method

According to an embodiment, a communication system includes a plurality of communication apparatuses. Each of the communication apparatuses includes a key generator and a synchronization processor. The key generator generates shared keys shared with another communication apparatus. The synchronization processor synchronizes at least one of order of using the generated shared keys and roles played when the generated shared keys are used, with another communication apparatus based on a rule determined in advance.

Communication system, communication apparatus, communication method, and computer program product

According to an embodiment, a communication device includes an acquirer and a determiner. The acquirer is configured to acquire a first history value for each of one or more applications that use an encryption key. The first history value indicates a history value of a volume of the encryption key used by the each of one or more applications. The determiner is configured to determine a volume of the encryption key to be assigned to the corresponding application, according to the first history value.

Communication device, communication method, computer program product, and communication system

According to an embodiment, a communication device is connected to a first network and a second network. The communication device includes a generating unit and a converting unit. The generating unit is configured to generate a first set of route information that is route information of the first network. The converting unit is configured to convert the first set of route information, and generate a second set of route information that is route information of the second network.

Communication device, communication system, communication method, and computer program product

According to an embodiment, a communication apparatus includes a cryptographic key storage, a transmitter, a receiver, and a sharing controller. The cryptographic key storage stores therein one or more cryptographic keys shared with an external device. The transmitter transmits specifying information that specifies at least one of the cryptographic keys to the external device. The receiver receives determination information that indicates a result of determination, which is made by the external device based on the specifying information, on whether the shared cryptographic key is consistent between the apparatus and the external device. When receiving the determination information indicating that the shared cryptographic key is inconsistent between the apparatus and the external device, the sharing controller deletes the cryptographic key specified by the specifying information from the cryptographic key storage.

Communication apparatus, computer program product, and communication system

According to an embodiment, a communication device is connected to a plurality of external devices which share key information with each other. The communication device includes a detector and an instructing unit. The detector is configured to, from among the external devices, detect an external device that has been subject to attack. The instructing unit is configured to issue an instruction to stop using key information which is shared with the detected external device.

Communication device, communication system, and computer program product

A communication device assigns a key taking the degree of priority of applications into account in a case where a key generation/sharing system in which a plurality of applications are connected to a node is not able to realize key assignment that satisfies the key rates requested by the plurality of applications. For example, the device realizes a method of assigning an application key that takes the degree of priority into account according to which control is performed in such a way that the key rate requested by an important application is preferentially satisfied.

Device, method, and system for encrypted communication by using encryption key

According to an embodiment, a communication apparatus includes a sharing processing unit, an extension unit, and a communication unit. The sharing processing unit shares a first cryptographic key with an external apparatus connected via a link, and further generates a second cryptographic key and shares the second cryptographic key with the external apparatus through secret communication using the first cryptographic key. The extension unit generates an extended key by extending a length of the second cryptographic key. The communication unit transmits the extended key to a first application which communicates with a second application to which the external apparatus provides the second cryptographic key.

Communication apparatus, communication system, and computer program product

According to an embodiment, a communication apparatus includes a key storage unit configured to store therein a cryptographic key; a receiving unit configured to receive a message; an analyzing unit configured to analyze whether the message includes an access request for the cryptographic key; a generating unit configured to, when the message includes the access request, generate request information used to request an access to the cryptographic key requested by the access request; and an access controller configured to control the access to the cryptographic key based on the request information.

Communication apparatus and key managing method

According to an embodiment, a communication device includes a cryptographic communication unit, a first communicating unit, and a control unit. The cryptographic communication unit is configured to perform cryptographic communication with an external device via a first network. The first communicating unit is configured to perform communication with a key generating device via a second network, the key generating device being configured to generate a cryptographic key to be used in the cryptographic communication. The control unit is configured to perform control to transmit an address registration request containing address information to the key generating device via the first communicating unit when a predetermined specific request is issued from among requests used in the cryptographic communication.

Communication device and computer program product

Growing community of inventors

Kanagawa, Japan

Hideaki Sato