Patents by Inventor Yoshimichi Tanizawa

Yoshimichi Tanizawa 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: 8782448
    Abstract: According to one embodiment, a communication device includes a start-up signal reception unit that receives a start-up signal that a start node transmits for starting up a node to be started; a first interface connected to Ethernet; a second interface connected to Ethernet; a power reception unit that receives PoE power through the first interface; a PoE controller that receives the start-up signal and PoE power and gives a transmission instruction of a start-up power signal which is a PoE power signal having a signal pattern corresponding to the start-up signal; and a power transmission unit that receives the transmission instruction from the PoE controller and transmits the start-up power signal through the second interface.
    Type: Grant
    Filed: September 13, 2011
    Date of Patent: July 15, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yoshimichi Tanizawa, Takeshi Ishihara, Kotaro Ise, Eiji Kamagata, Yuichiro Oyama, Takaomi Murakami
  • Publication number: 20140181508
    Abstract: 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.
    Type: Application
    Filed: September 5, 2013
    Publication date: June 26, 2014
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Yoshimichi TANIZAWA, Hideaki Sato, Shinichi Kawamura
  • Publication number: 20140181522
    Abstract: In general, according to one embodiment, a communication node includes a key synchronization controller and an application communicator. The key synchronization controller controls synchronization of an application key on the basis of a node-based signaling process and a session-based signaling process, where the former process is for starting or ending exchanging of an application key between a correspondent node and the communication node and the latter process is for synchronizing a rule for assignment of the application key to a session with the correspondent node, the session shared with the correspondent node. The application communicator provides the application key in accordance with the rule, the key for use by an application having the session.
    Type: Application
    Filed: September 5, 2013
    Publication date: June 26, 2014
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yoshimichi TANIZAWA, Shinichi Baba
  • Publication number: 20140143443
    Abstract: According to an embodiment, a communication device is structured to be connected to a plurality of external devices. The communication device includes an acquisition unit and a selector. The acquisition unit is configured to acquire resource information that represents a resource of cryptographic keys available from each external device. The selector is configured to select a path from among a plurality of paths for one of the external devices, based on a bottleneck and a hop count of the resource on the path.
    Type: Application
    Filed: September 25, 2013
    Publication date: May 22, 2014
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Ririka TAKAHASHI, Yoshimichi Tanizawa, Hideaki Sato
  • Publication number: 20140143537
    Abstract: In general, according to one embodiment, a communication apparatus includes an obtaining unit, generation unit, and communication unit. The obtaining unit obtains a master key from a first communication apparatus. The generation unit generates an individual key using the master key. The communication unit communicates with a second communication apparatus using the individual key.
    Type: Application
    Filed: November 20, 2013
    Publication date: May 22, 2014
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yasuyuki TANAKA, Mitsuru KANADA, Yoshimichi TANIZAWA
  • Publication number: 20140143867
    Abstract: 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.
    Type: Application
    Filed: November 18, 2013
    Publication date: May 22, 2014
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Yoshimichi TANIZAWA, Hideaki Sato, Ririka Takahashi
  • Publication number: 20140095957
    Abstract: According to one embodiment, a transmitter includes a signal dividing unit, a syndrome sending unit, a syndrome receiving unit and a decoding unit. The signal dividing unit divides an original signal into a first signal and a second signal based on a common dividing policy. The syndrome sending unit sends the first syndrome message calculated based on the first signal through a clear channel. The syndrome receiving unit receives a second syndrome message through the clear channel. The decoding unit decodes the second signal by using the second syndrome message to restore a fourth signal, the fourth signal being corresponding to the second signal received by a receiver through a noisy channel.
    Type: Application
    Filed: August 21, 2013
    Publication date: April 3, 2014
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Alex DIXON, Yoshimichi Tanizawa
  • Publication number: 20140089663
    Abstract: According to one embodiment, a communication method including acquiring an application key from a key-sharing network, determining a key use of the application key, and performing encryption communication by using the application key according to the determined key use.
    Type: Application
    Filed: August 21, 2013
    Publication date: March 27, 2014
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Yoshimichi TANIZAWA, Shinichi Baba
  • Publication number: 20140044260
    Abstract: According to an embodiment, a communication apparatus includes a finding unit; a negotiating unit; and a communicating unit. The finding unit is configured to, in response to a request from an application that makes use of key information, find out a key generating device that generates the key information. The negotiating unit is configured to perform a negotiation operation with respect to the key generating device to determine conditions for key information that is to be generated. The communicating unit is configured to receive, from the key generating device, the key information that is generated based on the conditions determined in the negotiation operation, and send the received key information to the application.
    Type: Application
    Filed: March 7, 2013
    Publication date: February 13, 2014
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Shinichi BABA, Yoshimichi Tanizawa, Hideaki Sato
  • Publication number: 20140013101
    Abstract: According to an embodiment, a communication device is connected to a key generating device which generates an encryption key. The communication device includes a querying unit, an encryption processor, and a selecting unit. The querying unit is configured to send a query to the key generating device about capability information which indicates capability of the key generating device to generate the encryption key. The encryption processor is configured to implement a plurality of encryption functions. The selecting unit is configured to select, from among the plurality of encryption functions, an encryption function according to the capability information. The encryption processor implements the encryption function thus selected.
    Type: Application
    Filed: March 12, 2013
    Publication date: January 9, 2014
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yoshimichi TANIZAWA, Shinichi BABA
  • Patent number: 8601568
    Abstract: A switching equipment stores identification information of communication established with respect to an infrastructure network system in a storage unit, and when an access request is received from a terminal device, the switching equipment adds the stored identification information to the access request and transfers the access request to a 1× Radius server. When the terminal device having requested the access is authenticated, the 1× Radius server notifies a PANA PAA of address information of the terminal device associated with the identification information added to the access request. The PANA PAA approves the same network access as the switching equipment with respect to the terminal device in the received address information.
    Type: Grant
    Filed: May 29, 2008
    Date of Patent: December 3, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yoshimichi Tanizawa, Naoki Esaka, Tsutomu Shibata
  • Patent number: 8583794
    Abstract: The storage unit stores therein authentication IDs that are used for authentication of users and address information in association with one another. The authentication processing unit receives from a PC an authentication message that includes an authentication ID and is used for the authentication of the user of a communication terminal, and performs authentication on the user based on the received authentication message. The SIP address acquiring unit acquires from the storage unit address information that corresponds to the authentication ID included in the authentication message when the user is authenticated. The SIP address registering unit sends the SIP location server a registration request for registering the acquired address information as the address information of the user of the IP telephone terminal associated with the PC that transmits the authentication message.
    Type: Grant
    Filed: September 2, 2008
    Date of Patent: November 12, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yoshimichi Tanizawa, Naoki Esaka, Tsutomu Shibata
  • Patent number: 8578455
    Abstract: A receiving unit receives authentication information unique to a terminal device with identification information from the terminal device. An authenticating unit authenticates the terminal device based on the authentication information. An acquiring unit acquires setting information for relaying a communication between a plurality of terminal devices, which is associated with the identification information of an authenticated terminal device from the storing unit. A transmitting unit transmits the setting information to the relay apparatus via a number of communication paths determined in advance, which is smaller than the number of terminal devices.
    Type: Grant
    Filed: August 17, 2007
    Date of Patent: November 5, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Naoki Esaka, Yoshimichi Tanizawa
  • Publication number: 20130259233
    Abstract: 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.
    Type: Application
    Filed: August 28, 2012
    Publication date: October 3, 2013
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Shinichi BABA, Yoshimichi Tanizawa, Hideaki Sato
  • Publication number: 20130251154
    Abstract: According to an embodiment, a key generating device connected to an external device includes a generating unit configured to generate an encryption key; a first communicating unit configured to transmit and receive the encryption key to and from the external device; a storage unit configured to stores therein state information indicating a communication state with respect to an application using the encryption key; and a controller configured to make a control of changing a frequency at which the generating unit generates the encryption key or a frequency at which the first communicating unit transmits and receives the encryption key according to the state information.
    Type: Application
    Filed: December 14, 2012
    Publication date: September 26, 2013
    Inventors: Yoshimichi TANIZAWA, Shinichi Baba
  • Publication number: 20130250826
    Abstract: An activation instructing portion to instruct an activation instruction to a communications module and a core module, when a receiver portion receives a activation signal, wherein upon reception of an activation instruction while in a halt mode, the core module switches from the halt mode to an operational mode, upon reception of the activation instruction while in a halt mode, the communications module switches from the halt mode to an operational mode, and sends a reception completion signal after switching to the operational mode, and a period of time needed for the communications module to switch to the operational mode after receiving the activation signal is shorter than that of the core module.
    Type: Application
    Filed: September 14, 2012
    Publication date: September 26, 2013
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yoshimichi Tanizawa, Takeshi Ishihara, Kotaro Ise
  • Publication number: 20130138900
    Abstract: According to an embodiment, an information processing device that includes a first storage unit and a second storage unit having power consumption different from that of the first storage unit. The information processing device also includes a control unit configured to make a control to determine a priority of information that is to be stored in the first storage unit or the second storage unit. The control unit is configured to store the information into the first storage unit or into the second storage unit based on the determined priority.
    Type: Application
    Filed: September 11, 2012
    Publication date: May 30, 2013
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Takeshi Ishihara, Yoshimichi Tanizawa, Kotaro Ise
  • Publication number: 20130083668
    Abstract: In one embodiment, there is provided a communication device including: a storage configured to store transmission packets and expected reply results; a controller configured to transmit the transmission packets to a network and to detect reply results corresponding to the transmission packets from the network; and a determination module configured to determine whether or not each of the reply results matches a corresponding one of the expected reply results. When the determination module determines that a reply result corresponding to one of the transmission packets matches a corresponding expected reply result, the controller continues to transmit another one of the transmission packets to the network and to detect a reply result corresponding to said another one of the transmission packets. When the determination module determines that the reply result does not match the corresponding expected reply result, the controller stops transmitting the remaining transmission packets to the network.
    Type: Application
    Filed: June 29, 2012
    Publication date: April 4, 2013
    Inventors: Yuichiro OYAMA, Takeshi Ishihara, Yoshimichi Tanizawa
  • Publication number: 20130047014
    Abstract: According to an embodiment, a communication apparatus includes a data reception controller configured to receive data from an external device functioning in an active state via a network and store the data in a buffer; a remote controller configured to, when a predetermined condition is satisfied, issue a request to the external device to switch to a power saving state; and a processor configured to process the data stored in the buffer.
    Type: Application
    Filed: June 28, 2012
    Publication date: February 21, 2013
    Inventors: Kotaro ISE, Takeshi ISHIHARA, Masataka GOTO, Yoshimichi TANIZAWA
  • Patent number: 8307200
    Abstract: An authentication apparatus includes a first storage unit that stores proxy information containing a proxy ID and capability data, an acquiring unit that acquires the proxy information from the first storage unit, a first transmitting unit that transmits a second message containing the acquired proxy information to a terminal, a receiving unit that receives a third message and authentication data, the third message containing a first proxy ID and setting data from the terminal, and an authentication unit that performs an authentication process based on the authentication data, and a second transmitting unit that transmits the setting data to a server to which a proxy of the first proxy ID relays data communication.
    Type: Grant
    Filed: July 13, 2007
    Date of Patent: November 6, 2012
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yoshimichi Tanizawa, Naoki Esaka, Tsutomu Shibata