Patents by Inventor Ken Sakamura
Ken Sakamura 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: 20090138708Abstract: In a cryptographic module distribution system, a cryptographic management server apparatus encrypts a cryptographic module using a key shared by a cryptographic apparatus, and transmits the encrypted cryptographic module to a client apparatus. The client apparatus transmits the encrypted cryptographic module to a cryptographic apparatus. The cryptographic apparatus decrypts the encrypted cryptographic module using the key shared by the cryptographic management server apparatus, and transmits the decrypted cryptographic module to the client apparatus. The client apparatus stores the received cryptographic module.Type: ApplicationFiled: September 18, 2008Publication date: May 28, 2009Inventors: Shingo Miyazaki, Takanori Nakamizo, Akito Niwa, Koji Okada, Kouya Tochikubo, Shigeyuki Fukushima, Chiaki Ishikawa, Noboru Koshizuka, Ken Sakamura
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Publication number: 20090138699Abstract: A cryptographic client device acquires a cryptographic key from a storage device son the basis of the accepted demand information, acquires a cryptographic evaluation description file from the storage device, acquires a cryptographic module corresponding to this cryptographic evaluation description file, executes a cryptographic process on the subject data to be performed the cryptographic process, and issues the encrypted subject data.Type: ApplicationFiled: September 18, 2008Publication date: May 28, 2009Inventors: Shingo MIYAZAKI, Fumihiko Sano, Koji Okada, Shigeyuki Fukushima, Chiaki Ishikawa, Noboru Koshizuka, Ken Sakamura
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Publication number: 20090129586Abstract: A cryptographic module management apparatus searches for cryptographic module meta-information based on the category information of a requested cryptographic module and, if associated cryptographic module category information is contained in this cryptographic module meta-information, searches for the cryptographic module meta-information of an associated cryptographic module, to generate composite type cryptographic module evaluation information based on this cryptographic module meta-information, select a cryptographic module based on this composite type cryptographic module evaluation information, and read this cryptographic module from a cryptographic module storage portion and output such composite type cryptographic module evaluation information.Type: ApplicationFiled: September 18, 2008Publication date: May 21, 2009Inventors: Shingo Miyazaki, Takanori Nakamizo, Akito Niwa, Koji Okada, Kouya Tochikubo, Shigeyuki Fukushima, Chiaki Ishikawa, Noboru Koshizuka, Ken Sakamura
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Patent number: 7416114Abstract: An electronic value transferring device such as a high speed and large capacity computer or mobile terminal device is disclosed that can function as a contactless IC card performing electronic value operations. The device is connectable to an IC card that performs electronic value operations, and includes a microprocessor for transmitting and receiving data to and from the IC card: an interface circuit for providing an IC card interface to allow the IC card to send and receive electronic values to and from other IC cards by radio; an antenna; and the microprocessor having a memory for temporarily storing plural electronic values.Type: GrantFiled: June 9, 2003Date of Patent: August 26, 2008Assignees: NTT DoCoMo, Inc.Inventors: Ken Sakamura, Noboru Koshizuka, Kensaku Mori, Kazuhiko Ishii, Hiroshi Aono, Sadayuki Hongo
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Patent number: 7403924Abstract: A portable terminal 20 according to the present invention is provided with an electronic book coupon storage 22, a book data receiver 24, an electronic book coupon deductor 25, and a book data decryptor 26. The electronic book coupon storage 22 stores an electronic book coupon used in acquisition of book data containing a plurality of page data units, along with a decryption key used in decryption of the plurality of page data units. The book data receiver 24 receives the book data from an electronic book providing server 30. The electronic book coupon deductor 25 deducts an electronic worth equivalent to a price according to page data requested to be readout, from the electronic book coupon. The book data decryptor 26 decrypts the page data in steps of one page data unit by use of the decryption key in conjunction with the deduction of the electronic worth.Type: GrantFiled: May 20, 2003Date of Patent: July 22, 2008Assignees: NTT DoCoMo, Inc.Inventors: Ken Sakamura, Noboru Koshizuka, Hiroshi Aono, Kazuhiko Ishii, Kensaku Mori, Sadayuki Hongo
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Publication number: 20080163251Abstract: An electronic value exchange system 100 comprises a mobile terminal 10 and a mobile terminal 20. The mobile terminal 10 causes a driver 12 to transmit an exchange offer message of electronic value V1, V2 to the mobile terminal 20. The mobile terminal 20 stores handlers that the driver 12 can execute in relationship to a message in a common table 221, and acquires a handler corresponding to the above-mentioned offer message, and notifies the exchange offer contents based on the handler to an application program 21. If the application program 21 consents to the offer contents according to the operation of a user, the electronic value V2 stored in an IC card 23 is transmitted to an IC card 13 via a driver 22 and the driver 12.Type: ApplicationFiled: April 21, 2005Publication date: July 3, 2008Inventors: Ken Sakamura, Noboru Koshizuka, Kensaku Mori, Masayuki Terada, Kazuhiko Ishii, Sadayuki Hongo
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Publication number: 20080133923Abstract: Realizing a data communication device and a data communication method enabling to specify an IC memory mounted in the communication device and to perform data communication to the communication device in which the IC memory is mounted. A mobile device 100 of transmitting side accepts a domain ID specifying a detachable IC memory uniquely from an application 102, a communication driver 105 obtains an IP address of the device of correspondent on the basis of the accepted domain ID from a name server 300 storing the domain ID and the IP address being associated with each other. Then, the communication driver 105 obtains a port ID which an IC memory of the device of correspondent assigned to an application, and transmits the domain ID and the port ID together with a transmission data to the IP address. The device of correspondent rims the application based on the received port ID and executes an appropriate processing.Type: ApplicationFiled: April 21, 2005Publication date: June 5, 2008Applicants: NTT DoCoMo, Inc, Ken Sakamura, Noboru KoshizukaInventors: Ken Sakamura, Noboru Koshizuka, Masayuki Terada, Kensaku Mori, Kazuhiko Ishii, Sadayuki Hongo
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Publication number: 20080134341Abstract: A folder containing at least one file can be created in a file storage (17) in response to a folder creation request from an owner (30) of an IC card (10), and an access authority to the folder can be set as an access control list (18A) of the folder in response to an access authority setting request from the owner (30). Then access to the file is controlled not only on the basis of the access authority to the file set by an issuer of a voucher (issuer of the file), but also on the basis of the access authority to the folder set by the owner (30).Type: ApplicationFiled: April 21, 2005Publication date: June 5, 2008Applicants: NTT DOCOMO, INC.Inventors: Ken Sakamura, Noboru Koshizuka, Kazuhiko Ishii, Masayuki Terada, Kensaku Mori, Sadayuki Hongo
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Publication number: 20080109371Abstract: Between an IC card (1) and a electronic ticket server (2), upon purchasing an electronic ticket a public key cryptosystem is employed for a mutual authentication to keep a strict security, and a shared secret between the electronic ticket and a ticket collecting machine is sent on a secure channel as well as the electronic ticket. Upon usage of the electronic ticket, the IC card (1) and the ticket collecting machine (6) mutually judge whether they carry out the mutual authentication by using a public key cryptosystem or a symmetric key cryptosystem. When they determine to use the symmetric key cryptosystem, they carry out the mutual authentication by using the shared secret exchanged beforehand. When they determine to use the public key cryptosystem, they carry out the mutual authentication by using the same method as that used upon purchasing the electronic ticket.Type: ApplicationFiled: December 17, 2007Publication date: May 8, 2008Applicants: Ken SAKAMURA, Noboru KOSHIZUKA, NTT DoCoMo, IncInventors: Ken Sakamura, Noboru Koshizuka, Hiroshi Aono, Kazuhiko Ishii, Kensaku Mori, Sadayuki Hongo
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Patent number: 7357329Abstract: The present invention avoids duplication and loss of digital contents by a transmitter/receiver and a malicious third party when the digital contents are transmitted on a communication platform where direct communication is performed between IC cards. A data communications method relating to the present invention includes the steps of executing a predetermined command when an IC card 1a receives a predetermined trigger signal; storing a state of the IC card 1a before transmission of first digital contents; performing an encryption process on the first digital contents based on key information associated with the first digital contents; deleting the first digital contents from a holder 18 of the IC card 1a when a commit instruction indicating completion of a reception process on the encrypted first digital contents is received from a destination device 1b: and performing a return process to the state of the IC card 1a when a transmission process on the first digital contents is interrupted.Type: GrantFiled: June 9, 2003Date of Patent: April 15, 2008Assignees: NTT DoCoMo, Inc.Inventors: Ken Sakamura, Noboru Koshizuka, Kensaku Mori, Kazuhiko Ishii, Hiroshi Aono, Sadayuki Hongo
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Patent number: 7346718Abstract: An autonomous integrated circuit card includes a logic external communication interface which directly communicates with a communication device connected to an integrated circuit card terminal main body via a network, in addition to a host device interface connected to an integrated card reader/writer via a physical layer. A communication control unit includes a software module which directly communicates with the communication device via the external communication interface. A central processing unit performs authentication via the communication control unit and reads value information stored in a nonvolatile memory. Further, the central processing unit encrypts the read value information by use of an encryption processing unit and directly transmits the encrypted value information to the communication device via the communication control unit and the external communication interface.Type: GrantFiled: June 10, 2003Date of Patent: March 18, 2008Assignees: NTT DoCoMo, Inc.Inventors: Ken Sakamura, Noboru Koshizuka, Kazuhiko Ishii, Kensaku Mori, Hiroshi Aono, Sadayuki Hongo
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Patent number: 7340243Abstract: Each IC card 1 notifies a server 3 of the ID of the IC card and the connection information of a terminal device to which the IC card is connected. The server 3 stores the ID and the connection information in a database 4 while associating the ID and the connection information with each other. When an IC card 1 communicates with another IC card, the IC card 1 requests the connection information concerning the destination IC card from the server 3 while specifying the ID of this IC card. The server 3 searches the database 4 for the connection information corresponding to the ID specified by the request, and notifies the requesting IC card 1 of the acquired connection information. This enables communications between IC cards even if the terminal device to which a destination IC card is connected has been changed in the past.Type: GrantFiled: June 10, 2003Date of Patent: March 4, 2008Assignees: NTT DoCoMo, Inc.Inventors: Ken Sakamura, Noboru Koshizuka, Kazuhiko Ishii, Kensaku Mori, Hiroshi Aono, Sadayuki Hongo
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Publication number: 20070250455Abstract: A portable terminal according to the present invention is provided with an electronic book coupon storage, a book data receiver, an electronic book coupon deductor, and a book data decryptor. The electronic book coupon storage stores an electronic book coupon used in acquisition of book data containing a plurality of page data units, along with a decryption key used in decryption of the plurality of page data units. The book data receiver receives the book data from an electronic book providing server. The electronic book coupon deductor deducts an electronic worth equivalent to a price according to page data requested to be read out, from the electronic book coupon. The book data decryptor decrypts the page data in steps of one page data unit by use of the decryption key in conjunction with the deduction of the electronic worth.Type: ApplicationFiled: May 25, 2007Publication date: October 25, 2007Applicants: NTT DoCoMo, Inc., Ken SAKAMURA, Noboru KOSHIZUKAInventors: Ken Sakamura, Noboru Koshizuka, Hiroshi Aono, Kazuhiko Ishii, Kensaku Mori, Sadayuki Hongo
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Publication number: 20070204148Abstract: An IC card (10) is provided with a file creator (16) for creating a voucher file (hereinafter referred to as “file”); an access control list setter (17) for setting an access authority to a created file; an authenticator (14) for performing mutual authentication with an authority recipient (authority recipient to which the whole or part of the access authority to the file has been transferred) and for examining authority transfer certificate data presented by the authority recipient; and an operation controller (15) for usually controlling an operation on the file on the basis of the set access authority and for, when the result of the examination of the authority transfer certificate data is normal, controlling the operation on the file by the authority recipient, based on the transfer content of the access authority indicated in the authority transfer certificate data, instead of the set access authority.Type: ApplicationFiled: April 21, 2005Publication date: August 30, 2007Applicant: NOBORU KOSHIZUKAInventors: Ken Sakamura, Noboru Koshizuka, Kazuhiko Ishii, Masayuki Terada, Kensaku Mori, Sadayuki Hongo
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Publication number: 20070149867Abstract: A server apparatus including: an electronic value receiving unit for receiving the electronic value from a communication terminal; an electronic worth charging unit for charging the electronic value received by the electronic value receiving unit, with an electronic worth; and an electronic value transmitting unit for transmitting the electronic value charged with the electronic worth by the electronic worth charging unit, to the communication terminal.Type: ApplicationFiled: March 9, 2007Publication date: June 28, 2007Applicants: NTT DoCoMo, Inc, Ken SAKAMURA, Noboru KOSHIZUKAInventors: Ken Sakamura, Noboru Koshizuka, Hiroshi Aono, Kazuhiko Ishii, Kensaku Mori, Sadayuki Hongo
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Publication number: 20060208067Abstract: The present invention is directed to avoidance of inconvenience arising from application program's incapability of recognizing processing executed on the IC card side, interruption of communication between IC cards, and so on on the occasion of an exchange of electronic values between the IC cards. A portable terminal 20, when receiving an exchange offer message of electronic values from a portable terminal 10, notifies an application program 21 of an exchange offer content based on a listener corresponding to the message. When the application program 21 accepts this offer content and when electronic values V1, V2 are determined as exchange objects, the portable terminal 20 returns an exchange confirmation message of the electronic values. When the portable terminal 10 receives the exchange confirmation message, it notifies an application program 11 of an exchange content based on a listener corresponding to the message.Type: ApplicationFiled: March 17, 2006Publication date: September 21, 2006Applicants: NTT DoComo, Inc., The University of TokyoInventors: Ken Sakamura, Noboru Koshizuka, Kensaku Mori, Masayuki Terada, Kazuhiko Ishii, Sadayuki Hongo
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Publication number: 20060210078Abstract: A Terminal equipment 10 has a message information accepter 12 for accepting message information from terminal program 26, an ID generator 14 for generating a thread ID for identifying the message information, a transmitter 16 for generating a message containing the message information and the thread ID and for transmitting the message to IC card 24, and a receiver 18 for receiving a message from the IC card 24. When the message received from the IC card 24 contains the thread ID inserted in the transmitted message, the message information accepter 12 returns the received message as a return value for the message information to the terminal program 26 and terminates a process attributed to the message information.Type: ApplicationFiled: March 17, 2006Publication date: September 21, 2006Applicants: NTT DoCoMo, Inc., The University of TokyoInventors: Ken Sakamura, Noboru Koshizuka, Masayuki Terada, Kensaku Mori, Kazuhiko Ishii, Sadayuki Hongo
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Publication number: 20060163364Abstract: One IC chip capable of performing both the contact and contactless functions is disclosed. A card and mobile terminal device is disclosed for enabling the IC chip to function as a contact or contactless IC card. The IC chip comprises a CPU; a contact interface connected to the CPU, for enabling data communications with the outside; and a contactless interface connected the CPU for enabling data communications with the outside. The card connectable to the contactless interface of the IC chip includes an antenna, and the antenna being connectable to the contactless interface of the IC chip to enable the IC chip to radio-communicate with the outside. The mobile terminal device connectable to the contact interface of the IC chip includes another CPU, which is connectable to and in communication with the contact interface of the IC chip to make the IC chip function as a contact IC chip.Type: ApplicationFiled: June 9, 2003Publication date: July 27, 2006Applicants: Ken SAKAMURA, Noboru KOSHIZUKA, NTT DoCoMo, IncInventors: Ken Sakamura, Noboru Koshizuka, Kensaku Mori, Kazuhiko Ishii, Hiroshi Aono, Sadayuki Hongo
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Publication number: 20060097037Abstract: An electronic value transferring device such as a high speed and large capacity computer or mobile terminal device is disclosed that can function as a contactless IC card performing electronic value operations. The device is connectable to an IC card that performs electronic value operations, and includes a microprocessor for transmitting and receiving data to and from the IC card; an interface circuit for providing an IC card interface to allow the IC card to send and receive electronic values to and from other IC cards by radio; an antenna; and the microprocessor having a memory for temporarily storing plural electronic values.Type: ApplicationFiled: June 9, 2003Publication date: May 11, 2006Applicants: Ken SAKAMURA, Noboru KOSHIZUKA, NTT DoCoCoMo, inc.Inventors: Ken Sakamura, Noboru Koshizuka, Kensaku Mori, Kazuhiko Ishii, Hiroshi Aono, Sadayuki Hongo
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Publication number: 20060049243Abstract: The present invention avoids duplication and loss of digital contents by a transmitter/receiver and a malicious third party when the digital contents are transmitted on a communication platform where direct communication is performed between IC cards. A data communications method relating to the present invention includes the steps of executing a predetermined command when an IC card 1a receives a predetermined trigger signal; storing a state of the IC card 1a before transmission of first digital contents; performing an encryption process on the first digital contents based on key information associated with the first digital contents; deleting the first digital contents from a holder 18 of the IC card 1a when a commit instruction indicating completion of a reception process on the encrypted first digital contents is received from a destination device 1b: and performing a return process to the state of the IC card 1a when a transmission process on the first digital contents is interrupted.Type: ApplicationFiled: June 9, 2003Publication date: March 9, 2006Applicants: Ken SAKAMURA, Noboru KOSHIZUKAInventors: Ken Sakamura, Noboru Koshizuka, Kensaku Mori, Kazuhlko Ishii, Hiroshi Aono, Sadayukl Hongo