Patents by Inventor Jun Kurihara

Jun Kurihara 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).

  • Receipt management system
    Patent number: 8392258
    Abstract: A receipt management system receives receipt data including biometric data which is issued when a product is purchased at a store, and judges whether or not biometric data that coincides with an employee's biometric data is registered in an employee management table of a company.
    Type: Grant
    Filed: April 6, 2010
    Date of Patent: March 5, 2013
    Assignee: Fujitsu Frontech Limited
    Inventor: Jun Kurihara
  • Threshold secret sharing apparatus, threshold secret sharing scheme, secret information decryption method, and program for the same
    Patent number: 8275124
    Abstract: A threshold secret sharing apparatus, a threshold secret sharing scheme, a secret information recovery apparatus a secret information recovery method, and a program thereof are provided using XOR computation, thereby offering a general (k,n) threshold secret sharing scheme with high computation speed. Secret information K is divided into (np?1) divided pieces of secret information Kq (np is a prime number which is equal to or greater than a secret distribution number n). Furthermore, dummy secret information K0 is generated. Moreover, random numbers R, which are mutually independent are generated. Then, pieces of shares are created using exclusive-OR (XOR) operations based upon the dummy secret information K0, the divided piece of secret information Kq, and the random numbers R. The pieces of shares thus generated are concatenated so as to generate n shares Si, thereby providing a (k,n) threshold secret sharing scheme.
    Type: Grant
    Filed: January 15, 2008
    Date of Patent: September 25, 2012
    Assignee: KDDI Corporation
    Inventors: Jun Kurihara, Shinsaku Kiyomoto, Toshiaki Tanaka
  • RECEIPT MANAGEMENT SYSTEM
    Publication number: 20100274685
    Abstract: A receipt management system receives receipt data including biometric data which is issued when a product is purchased at a store, and judges whether or not biometric data that coincides with an employee's biometric data is registered in an employee management table of a company.
    Type: Application
    Filed: April 6, 2010
    Publication date: October 28, 2010
    Applicant: FUJITSU FRONTECH LIMITED
    Inventor: Jun Kurihara
  • THRESHOLD SECRET SHARING APPARATUS, THRESHOLD SECRET SHARING SCHEME, SECRET INFORMATION DECRYPTION METHOD, AND PROGRAM FOR THE SAME
    Publication number: 20080205637
    Abstract: A threshold secret sharing apparatus, a threshold secret sharing scheme, a secret information recovery apparatus a secret information recovery method, and a program thereof are provided using XOR computation, thereby offering a general (k,n) threshold secret sharing scheme with high computation speed. Secret information K is divided into (np?1) divided pieces of secret information Kq (np is a prime number which is equal to or greater than a secret distribution number n). Furthermore, dummy secret information K0 is generated. Moreover, random numbers R, which are pairwise independent are generated. Then, pieces of shares are created using exclusive-OR (XOR) operations based upon the dummy secret information K0, the divided piece of secret information Kq, and the random numbers R. The pieces of shares thus generated are concatenated so as to generate n shares Si, thereby providing a (k,n) threshold secret sharing scheme.
    Type: Application
    Filed: January 15, 2008
    Publication date: August 28, 2008
    Applicant: KDDI CORPORATION
    Inventors: Jun KURIHARA, Shinsaku KIYOMOTO, Toshiaki TANAKA