Patents by Inventor Pyong-Hee Han

Pyong-Hee Han 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).

  • Method for generating standard file based on steganography technology and apparatus and method for validating integrity of metadata in the standard file
    Patent number: 8769292
    Abstract: An apparatus for validating integrity of metadata in a standard file includes: a metadata acquiring unit for acquiring metadata from a protected file; an integrity evidence value acquiring unit for acquiring an integrity evidence value from a file or a database; a secret information extracting unit for extracting secret information of a file data; and a metadata integrity validating unit for checking if the metadata is correct by using the acquired metadata, the acquired integrity evidence value, and the extracted secret information.
    Type: Grant
    Filed: March 21, 2008
    Date of Patent: July 1, 2014
    Assignee: KT Corporation
    Inventors: Jong-Heum Kim, Jong-An Kim, Pyong-Hee Han
  • METHOD FOR GENERATING STANDARD FILE BASED ON STEGANOGRAPHY TECHNOLOGY AND APPARATUS AND METHOD FOR VALIDATING INTEGRITY OF METADATA IN THE STANDARD FILE
    Publication number: 20080229099
    Abstract: An apparatus for validating integrity of metadata in a standard file includes: a metadata acquiring unit for acquiring metadata from a protected file; an integrity evidence value acquiring unit for acquiring an integrity evidence value from a file or a database; a secret information extracting unit for extracting secret information of a file data; and a metadata integrity validating unit for checking if the metadata is correct by using the acquired metadata, the acquired integrity evidence value, and the extracted secret information.
    Type: Application
    Filed: March 21, 2008
    Publication date: September 18, 2008
    Applicant: KT CORPORATION
    Inventors: Jong-Heum Kim, Jong-An Kim, Pyong-Hee Han