Patents by Inventor Shinako Mastuyama

Shinako Mastuyama 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).

  • Public key certificate issuing system, public key certificate issuing method, digital certification apparatus, and program storage medium
    Publication number: 20100228970
    Abstract: A public key certificate issuing system is disclosed which comprises a certificate authority for issuing a public key certificate used by an entity, and a registration authority which, on receiving a public key certificate issuance request from anyone of entities under jurisdiction thereof, transmits the received request to the certificate authority. The certificate authority, having a plurality of signature modules each executing a different signature algorithm, selects at least one of the plurality of signature modules in accordance with the public key certificate issuance request from the registration authority, and causes the selected signature module to attach a digital signature to message data constituting a public key certificate.
    Type: Application
    Filed: March 3, 2010
    Publication date: September 9, 2010
    Applicant: Sony Corporation
    Inventors: Makoto Oka, Yoshihito Ishibashi, Shinako Mastuyama, Hideaki Watanabe
  • Public key certificate issuing system, Public key certificate issuing method, digital certification apparatus, and program storage medium
    Publication number: 20020108042
    Abstract: A public key certificate issuing system is disclosed which comprises a certificate authority for issuing a public key certificate used by an entity, and a registration authority which, on receiving a public key certificate issuance request from any one of entities under jurisdiction thereof, transmits the received request to the certificate authority. The certificate authority, having a plurality of signature modules each executing a different signature algorithm, selects at least one of the plurality of signature modules in accordance with the public key certificate issuance request from the registration authority, and causes the selected signature module to attach a digital signature to message data constituting a public key certificate.
    Type: Application
    Filed: January 9, 2002
    Publication date: August 8, 2002
    Inventors: Makoto Oka, Yoshihito Ishibashi, Shinako Mastuyama, Hideaki Watanabe