Patents by Inventor Saburo TOYONAGA

Saburo TOYONAGA 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: 10389531
    Abstract: An authentication system includes a terminal having a transmitter, a processor, and a memory, and a server having a receiver, a processor and a memory. The terminal transmits request information to the server. The terminal acquires time information, generates a first one-time password at a pre-determined cycle by using the time information within the terminal, and generates encryption information which is acquired by encrypting the request information using the first one-time password as a key, the encryption information being transmitted from the terminal to the server. The server acquires time information within the server, generates a second one-time password at the pre-determined cycle as the cycle within the terminal by using the time information within the server, generates reference information which is acquired by decoding the encryption information using the second one-time password as a key, and compares the request information with the reference information.
    Type: Grant
    Filed: July 6, 2017
    Date of Patent: August 20, 2019
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Saburo Toyonaga, Hiroyuki Tanaka, Masakatsu Matsuo
  • Patent number: 10015159
    Abstract: Provided is a terminal authentication system including a client terminal and a server device. The client terminal transmits first information based on secret information different for each client terminal and a client certificate including a hash value of the secret information which is derived from the secret information, to a server device. The server device receives the first information and the client certificate, derives a hash value from the secret information based on the first information using a unidirectional function, and authenticates the client terminal on the basis of the derived hash value and the hash value of the secret information which is included in the client certificate.
    Type: Grant
    Filed: May 14, 2015
    Date of Patent: July 3, 2018
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Saburo Toyonaga, Hiroyuki Tanaka, Kenjiro Ike, Masakatsu Matsuo
  • Publication number: 20170310668
    Abstract: An authentication system includes a terminal having a transmitter, a processor, and a memory, and a server having a receiver, a processor and a memory. The terminal transmits request information to the server. The terminal acquires time information, generates a first one-time password at a pre-determined cycle by using the time information within the terminal, and generates encryption information which is acquired by encrypting the request information using the first one-time password as a key, the encryption information being transmitted from the terminal to the server. The server acquires time information within the server, generates a second one-time password at the pre-determined cycle as the cycle within the terminal by using the time information within the server, generates reference information which is acquired by decoding the encryption information using the second one-time password as a key, and compares the request information with the reference information.
    Type: Application
    Filed: July 6, 2017
    Publication date: October 26, 2017
    Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Saburo TOYONAGA, Hiroyuki TANAKA, Masakatsu MATSUO
  • Patent number: 9742765
    Abstract: Provided is an authentication system in which a client terminal that receives input of request information is connected to a server that executes a process with regard to the request information. The client terminal includes: a first authentication information generation unit that generates first authentication information based on information which is shared with the server; an encryption unit that generates encryption information; and a transmission unit that transmits the request information and encryption information to the server.
    Type: Grant
    Filed: January 7, 2015
    Date of Patent: August 22, 2017
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Saburo Toyonaga, Hiroyuki Tanaka, Masakatsu Matsuo
  • Patent number: 9692770
    Abstract: Provided is a signature verification system including a communication device and a verification device. The communication device and the verification device are connected to each other through a network. The communication device derives a first hash value from a first random number, derives a second hash value from data including electronic data and a certificate of the communication device which includes the first hash value and a public key of the communication device, using a unidirectional function, generates a signature using a secret key of the communication device with respect to the second hash value, and transmits the electronic data, the certificate, and the signature to the verification device.
    Type: Grant
    Filed: May 14, 2015
    Date of Patent: June 27, 2017
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Kenjiro Ike, Saburo Toyonaga, Hiroyuki Tanaka, Masakatsu Matsuo
  • Patent number: 9525557
    Abstract: Provided is a certificate issuing system including a client terminal and a server device. The client terminal derives a first hash value from a first random number using a unidirectional function, generates a secret key and a public key of the client terminal, and transmits the first hash value and the public key of the client terminal to the server device. The server device receives the first hash value and the public key of the client terminal from the client terminal, stores the first hash value, authenticates the client terminal on the basis of the stored first hash value and the derived first hash value, generates a client certificate on the basis of the public key of the client terminal and a secret key of the server device when the authentication succeeds, and transmits the client certificate to the client terminal.
    Type: Grant
    Filed: May 13, 2015
    Date of Patent: December 20, 2016
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Hiroyuki Tanaka, Saburo Toyonaga, Kenjiro Ike, Masakatsu Matsuo
  • Publication number: 20150350197
    Abstract: Provided is a signature verification system including a communication device and a verification device. The communication device and the verification device are connected to each other through a network. The communication device derives a first hash value from a first random number, derives a second hash value from data including electronic data and a certificate of the communication device which includes the first hash value and a public key of the communication device, using a unidirectional function, generates a signature using a secret key of the communication device with respect to the second hash value, and transmits the electronic data, the certificate, and the signature to the verification device.
    Type: Application
    Filed: May 14, 2015
    Publication date: December 3, 2015
    Inventors: Kenjiro Ike, Saburo Toyonaga, Hiroyuki Tanaka, Masakatsu Matsuo
  • Publication number: 20150350196
    Abstract: Provided is a terminal authentication system including a client terminal and a server device. The client terminal transmits first information based on secret information different for each client terminal and a client certificate including a hash value of the secret information which is derived from the secret information, to a server device. The server device receives the first information and the client certificate, derives a hash value from the secret information based on the first information using a unidirectional function, and authenticates the client terminal on the basis of the derived hash value and the hash value of the secret information which is included in the client certificate.
    Type: Application
    Filed: May 14, 2015
    Publication date: December 3, 2015
    Inventors: Saburo Toyonaga, Hiroyuki Tanaka, Kenjiro Ike, Masakatsu Matsuo
  • Publication number: 20150341178
    Abstract: Provided is a certificate issuing system including a client terminal and a server device. The client terminal derives a first hash value from a first random number using a unidirectional function, generates a secret key and a public key of the client terminal, and transmits the first hash value and the public key of the client terminal to the server device. The server device receives the first hash value and the public key of the client terminal from the client terminal, stores the first hash value, authenticates the client terminal on the basis of the stored first hash value and the derived first hash value, generates a client certificate on the basis of the public key of the client terminal and a secret key of the server device when the authentication succeeds, and transmits the client certificate to the client terminal.
    Type: Application
    Filed: May 13, 2015
    Publication date: November 26, 2015
    Inventors: Hiroyuki Tanaka, Saburo Toyonaga, Kenjiro Ike, Masakatsu Matsuo
  • Publication number: 20150195280
    Abstract: Provided is an authentication system in which a client terminal that receives input of request information is connected to a server that executes a process with regard to the request information. The client terminal includes: a first authentication information generation unit that generates first authentication information based on information which is shared with the server; an encryption unit that generates encryption information; and a transmission unit that transmits the request information and encryption information to the server.
    Type: Application
    Filed: January 7, 2015
    Publication date: July 9, 2015
    Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Saburo TOYONAGA, Hiroyuki TANAKA, Masakatsu MATSUO