Patents by Inventor Asahiko Yamada

Asahiko Yamada 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).

  • Patent number: 9736151
    Abstract: According to an embodiment, a biometric reference information storage apparatus transmits, to the biometric reference information certificate generation apparatus, a biometric authentication context including the challenge information, the hash value of the biometric reference information, and a first digital signature. The biometric reference information certificate generation apparatus verifies the challenge information and the first digital signature. The biometric reference information certificate generation apparatus transmits a biometric reference information certificate to the biometric reference information storage apparatus. The biometric reference information storage apparatus writes the biometric reference information and the biometric reference information certificate in a storage module.
    Type: Grant
    Filed: March 26, 2015
    Date of Patent: August 15, 2017
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA SOLUTIONS CORPORATION
    Inventors: Tatsuro Ikeda, Asahiko Yamada, Koji Okada
  • Patent number: 9386016
    Abstract: An authentication device receives each authentication context including an output information block, an input information block, and an authenticator block. The output information block includes a process result and process result identification information. The input information block includes a process result and process result identification information. The authentication device verifies each authenticator block. The authentication device searches for the output information block having the same value of process result identification information as the value of process result identification information in the input information block from other authentication contexts based on process result identification information in the input information block included in each authentication context.
    Type: Grant
    Filed: August 17, 2007
    Date of Patent: July 5, 2016
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA SOLUTIONS CORPORATION
    Inventors: Hidehisa Takamizawa, Asahiko Yamada, Tomoaki Morijiri, Koji Okada, Tatsuro Ikeda, Minoru Nishizawa, Yoshihiro Fujii
  • Publication number: 20150200935
    Abstract: According to an embodiment, a biometric reference information storage apparatus transmits, to the biometric reference information certificate generation apparatus, a biometric authentication context including the challenge information, the hash value of the biometric reference information, and a first digital signature. The biometric reference information certificate generation apparatus verifies the challenge information and the first digital signature. The biometric reference information certificate generation apparatus transmits a biometric reference information certificate to the biometric reference information storage apparatus. The biometric reference information storage apparatus writes the biometric reference information and the biometric reference information certificate in a storage module.
    Type: Application
    Filed: March 26, 2015
    Publication date: July 16, 2015
    Applicants: Kabushiki Kaisha Toshiba, Toshiba Solutions Corporation
    Inventors: Tatsuro IKEDA, Asahiko YAMADA, Koji OKADA
  • Publication number: 20150188916
    Abstract: According to one embodiment, there is provided a VPN connection authentication system including a user terminal that is used by a user, an authentication server that is connected to the user terminal and configured to communicate with the user terminal, a biometric authentication result evidence information verification server that is incorporated in the authentication server or is connected to the authentication server and configured to communicate with the authentication server, an authentication information management DB configured to be writable from the authentication server, and a VPN connection server that is connected to the user terminal by VPN and configured to communicate with the user terminal.
    Type: Application
    Filed: March 13, 2015
    Publication date: July 2, 2015
    Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA SOLUTIONS CORPORATION
    Inventors: Asahiko YAMADA, Tatsuro IKEDA
  • Publication number: 20140259120
    Abstract: A verification device transmits challenge information to a first entity device, and for each authentication context received in return, verifies that challenge information identical to the challenge information transmitted in advance is described, to thereby confirm that the authentication context is the current one. As a result, a repetitive attack in which the past authentication context is repeatedly used is prevented and the security against repetitive attacks is improved.
    Type: Application
    Filed: May 19, 2014
    Publication date: September 11, 2014
    Applicants: Kabushiki Kaisha Toshiba, Toshiba Solutions Corporation
    Inventors: Tomoaki Morijiri, Koji Okada, Hidehisa Takamizawa, Asahiko Yamada, Tatsuro Ikeda
  • Patent number: 8744970
    Abstract: In an information communication system, user personal information is batch-managed in a user management center apparatus. The center apparatus issues temporary information, which includes temporary user information and temporary authentication information, in response to a log-in request from a user terminal apparatus that designates a net-shop apparatus, and sends the information to the user terminal apparatus and the designated net-shop apparatus. Thereby, if the user terminal apparatus sends an authentication request to the net-shop apparatus on the basis of the information, the net-shop apparatus can authenticate the user terminal apparatus on the basis of the information from the user management center apparatus. At this time, the user personal information does not go to the net-shop apparatus, and there is no need for the net-shop apparatus to manage the user personal information.
    Type: Grant
    Filed: February 21, 2008
    Date of Patent: June 3, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Shinichi Kurihara, Asahiko Yamada
  • Patent number: 8732461
    Abstract: A client apparatus receives a message including a random number from a server apparatus during the handshake of agreement process, creates a biometric negotiation message including the biometric authentication method information and sends the biometric negotiation message to the server apparatus. Then, the client apparatus executes a biometric authentication based on biometric authentication method information notified from the server apparatus and encrypts the random number based on the private key. In addition, the client apparatus generates an authenticator from a result of the biometric authentication, the biometric authentication method information, the encrypted random number, and the client certificate, and sends to the server apparatus an authentication context including these. The server apparatus verifies the authentication context and establishes a secure session in one handshake.
    Type: Grant
    Filed: February 12, 2010
    Date of Patent: May 20, 2014
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Solutions Corporation
    Inventors: Yoshihiro Fujii, Tatsuro Ikeda, Koji Okada, Tomoaki Morijiri, Minoru Nishizawa, Hidehisa Takamizawa, Asahiko Yamada
  • Patent number: 8666899
    Abstract: In an information communication system, user personal information is batch-managed in a user management center apparatus. The center apparatus issues temporary information, which includes temporary user information and temporary authentication information, in response to a log-in request from a user terminal apparatus that designates a net-shop apparatus, and sends the information to the user terminal apparatus and the designated net-shop apparatus. Thereby, if the user terminal apparatus sends an authentication request to the net-shop apparatus on the basis of the information, the net-shop apparatus can authenticate the user terminal apparatus on the basis of the information from the user management center apparatus. At this time, the user personal information does not go to the net-shop apparatus, and there is no need for the net-shop apparatus to manage the user personal information.
    Type: Grant
    Filed: September 7, 2005
    Date of Patent: March 4, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Shinichi Kurihara, Asahiko Yamada
  • Patent number: 8578446
    Abstract: A configuration including, in authentication contexts, function unit identification information unique to the function unit that has executed an authentication subprocess in entity devices permits an authentication apparatus to specify the function unit that has executed the authentication subprocess in the entity devices. The verifier, therefore, can verify the legitimacy of the authentication subprocess from the authentication context even in the presence of a plurality of function units capable of executing the same authentication subprocess in the entity devices.
    Type: Grant
    Filed: January 3, 2008
    Date of Patent: November 5, 2013
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Solutions Corporation
    Inventors: Hidehisa Takamizawa, Koji Okada, Tomoaki Morijiri, Tatsuro Ikeda, Minoru Nishizawa, Yoshihiro Fujii, Asahiko Yamada
  • Publication number: 20130246281
    Abstract: According to one embodiment, the verifying device sends, to the service providing device, the user identification information in the user identification information certificate and the execution result that indicates properness when all the verification results are proper. the service providing device reads service user identification information associated with the user identification information in response to user identification information and a verification result. The service providing device sends the service information to the user terminal in accordance with the read service user identification information.
    Type: Application
    Filed: May 10, 2013
    Publication date: September 19, 2013
    Applicants: TOSHIBA SOLUTIONS CORPORATION, KABUSHIKI KAISHA TOSHIBA
    Inventors: Asahiko YAMADA, Koji Okada, Tatsuro Ikeda
  • Patent number: 8499147
    Abstract: A root-account management apparatus generates an electronic signature based on a survival condition and a secret key when an authentication result of a user of a client apparatus is proper, and transmits derived-account credence element information including the survival condition, the electronic signature and a public key certificate to a derived-account management apparatus. The derived-account management apparatus creates derived-account information which becomes valid when the survival condition is satisfied so that the derived-account information includes both the derived-account credence element information which becomes invalid when a validity term of the public key certificate expires and a biometric information template of the user which is valid regardless of this validity term. Accordingly, even if an authentication element as a root (public key certificate) becomes invalid, a derived authentication element (biometric information template) can be prevented from becoming invalid.
    Type: Grant
    Filed: July 10, 2009
    Date of Patent: July 30, 2013
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Solutions Corporation
    Inventors: Tatsuro Ikeda, Koji Okada, Tomoaki Morijiri, Minoru Nishizawa, Hidehisa Takamizawa, Yoshihiro Fujii, Asahiko Yamada
  • Patent number: 8332648
    Abstract: According to one embodiment of the present invention, the first authentication context includes the template certificate indicative of the validity of a template and the first apparatus evaluation certificate indicative of the validity of the first apparatus evaluating information while the second authentication context includes the second apparatus evaluating certificate indicative of the validity of the second apparatus evaluating information. And the template certificate and the first and second evaluation certificates are verified when verifying the first and second authentication contexts. Thus, the validity of the template used for authentication or the apparatus evaluating information included in the authentication context can be verified.
    Type: Grant
    Filed: January 28, 2010
    Date of Patent: December 11, 2012
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Solutions Corporation
    Inventors: Tomoaki Morijiri, Koji Okada, Tatsuro Ikeda, Minoru Nishizawa, Hidehisa Takamizawa, Yoshihiro Fujii, Asahiko Yamada
  • Patent number: 8281373
    Abstract: A client apparatus transmits environmental information acquired from an environmental information acquisition device as well as a biometric authentication information matching result to a server apparatus. The server apparatus verifies the validity of the environmental information such as a luminance as well as the validity of the biometric authentication information matching result. If an environment is problematic, the server apparatus notifies the client apparatus that the environmental information is problematic. The client apparatus overcomes the problem of the environment such as the luminance based on the notification from the server apparatus and then retries a biometric authentication. The possibility of re-failure due to the environmental problem can be reduced during a retry of the biometric authentication.
    Type: Grant
    Filed: April 6, 2011
    Date of Patent: October 2, 2012
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Solutions Corporation
    Inventors: Yoshihiro Fujii, Minoru Nishizawa, Tatsuro Ikeda, Koji Okada, Tomoaki Morijiri, Hidehisa Takamizawa, Asahiko Yamada
  • Patent number: 8028330
    Abstract: A client apparatus transmits environmental information acquired from an environmental information acquisition device as well as a biometric authentication information matching result to a server apparatus. The server apparatus verifies the validity of the environmental information such as a luminance as well as the validity of the biometric authentication information matching result. If an environment is problematic, the server apparatus notifies the client apparatus that the environmental information is problematic. The client apparatus overcomes the problem of the environment such as the luminance based on the notification from the server apparatus and then retries a biometric authentication. The possibility of re-failure due to the environmental problem can be reduced during a retry of the biometric authentication.
    Type: Grant
    Filed: January 3, 2008
    Date of Patent: September 27, 2011
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Solutions Corporation
    Inventors: Yoshihiro Fujii, Minoru Nishizawa, Tatsuro Ikeda, Koji Okada, Tomoaki Morijiri, Hidehisa Takamizawa, Asahiko Yamada
  • Publication number: 20110185413
    Abstract: A client apparatus transmits environmental information acquired from an environmental information acquisition device as well as a biometric authentication information matching result to a server apparatus. The server apparatus verifies the validity of the environmental information such as a luminance as well as the validity of the biometric authentication information matching result. If an environment is problematic, the server apparatus notifies the client apparatus that the environmental information is problematic. The client apparatus overcomes the problem of the environment such as the luminance based on the notification from the server apparatus and then retries a biometric authentication. The possibility of re-failure due to the environmental problem can be reduced during a retry of the biometric authentication.
    Type: Application
    Filed: April 6, 2011
    Publication date: July 28, 2011
    Inventors: YOSHIHIRO FUJII, Minoru Nishizawa, Tatsuro Ikeda, Koji Okada, Tomoaki Morijiri, Hidehisa Takamizawa, Asahiko Yamada
  • Patent number: 7840808
    Abstract: A client device transmits service identification information to an authentication device at the time of a service request, prompts selection of one or more authentication entity devices which execute one or more authentication subprocesses from among all the authentication entity devices adaptive to profile information received from the authentication device, based on “function list information defining an execution environment of each of the authentication entity devices”, transmits a request for executing an authentication subprocess to such selected each authentication entity device, and transmits to the authentication device “authentication context information including an execution environment and an execution result of an authentication subprocess” received from such each authentication entity device.
    Type: Grant
    Filed: October 24, 2006
    Date of Patent: November 23, 2010
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Solutions Corporation
    Inventors: Hidehisa Takamizawa, Koji Okada, Tatsuro Ikeda, Tomoaki Morijiri, Asahiko Yamada
  • Publication number: 20100191967
    Abstract: A client apparatus receives a message including a random number from a server apparatus during the handshake of agreement process, creates a biometric negotiation message including the biometric authentication method information and sends the biometric negotiation message to the server apparatus. Then, the client apparatus executes a biometric authentication based on biometric authentication method information notified from the server apparatus and encrypts the random number based on the private key. In addition, the client apparatus generates an authenticator from a result of the biometric authentication, the biometric authentication method information, the encrypted random number, and the client certificate, and sends to the server apparatus an authentication context including these. The server apparatus verifies the authentication context and establishes a secure session in one handshake.
    Type: Application
    Filed: February 12, 2010
    Publication date: July 29, 2010
    Inventors: Yoshihiro FUJII, Tatsuro Ikeda, Koji Okada, Tomoaki Morijiri, Minoru Nishizawa, Hidehisa Takamizawa, Asahiko Yamada
  • Publication number: 20100180124
    Abstract: According to one embodiment of the present invention, the first authentication context includes the template certificate indicative of the validity of a template and the first apparatus evaluation certificate indicative of the validity of the first apparatus evaluating information whilst the second authentication context includes the second apparatus evaluating certificate indicative of the validity of the second apparatus evaluating information. And the template certificate and the first and second evaluation certificates are verified when verifying the first and second authentication contexts. Thus, the validity of the template used for authentication or the apparatus evaluating information included in the authentication context can be verified.
    Type: Application
    Filed: January 28, 2010
    Publication date: July 15, 2010
    Inventors: Tomoaki Morijiri, Koji Okada, Tatsuro Ikeda, Minoru Nishizawa, Hidehisa Takamizawa, Yoshihiro Fujii, Asahiko Yamada
  • Publication number: 20090327706
    Abstract: A root-account management apparatus generates an electronic signature based on a survival condition and a secret key when an authentication result of a user of a client apparatus is proper, and transmits derived-account credence element information including the survival condition, the electronic signature and a public key certificate to a derived-account management apparatus. The derived-account management apparatus creates derived-account information which becomes valid when the survival condition is satisfied so that the derived-account information includes both the derived-account credence element information which becomes invalid when a validity term of the public key certificate expires and a biometric information template of the user which is valid regardless of this validity term. Accordingly, even if an authentication element as a root (public key certificate) becomes invalid, a derived authentication element (biometric information template) can be prevented from becoming invalid.
    Type: Application
    Filed: July 10, 2009
    Publication date: December 31, 2009
    Inventors: Tatsuro IKEDA, Koji Okada, Tomoaki Morijiri, Minoru Nishizawa, Hidehisa Takamizawa, Yoshihiro Fujii, Asahiko Yamada
  • Publication number: 20080172729
    Abstract: An authentication device receives each authentication context including an output information block, an input information block, and an authenticator block. The output information block includes a process result and process result identification information. The input information block includes a process result and process result identification information. The authentication device verifies each authenticator block. The authentication device searches for the output information block having the same value of process result identification information as the value of process result identification information in the input information block from other authentication contexts based on process result identification information in the input information block included in each authentication context.
    Type: Application
    Filed: August 17, 2007
    Publication date: July 17, 2008
    Inventors: Hidehisa TAKAMIZAWA, Asahiko YAMADA, Tomoaki MORIJIRI, Koji OKADA, Tatsuro IKEDA, Minoru NISHIZAWA, Yoshihiro FUJII