Patents by Inventor Dae-Won Mun

Dae-Won Mun 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 indexing encrypted column
    Patent number: 8281153
    Abstract: The present invention relates to a method of creating indexes so that an index scan can be worked for columns in a database encrypted by means of secrete key cipher algorithm. The method of creating indexes according to the present invention comprises the steps of: re-encrypting to be able to maintain the sort ordering based on a plain text; creating new indexes based on the re-encrypted data; and configuring domain index architecture of encrypted columns so that the created index is used for the index scan in a query statement.
    Type: Grant
    Filed: September 28, 2007
    Date of Patent: October 2, 2012
    Assignee: Eglobal System Co.
    Inventors: Hee-Chang Kang, Dae-Won Mun, Yu-ho Kim
  • METHOD FOR INDEXING ENCRYPTED COLUMN
    Publication number: 20100169665
    Abstract: The present invention relates to a method of creating indexes so that an index scan can be worked for columns in a database encrypted by means of secrete key cipher algorithm.
    Type: Application
    Filed: September 28, 2007
    Publication date: July 1, 2010
    Inventors: Hee-Chang Kang, Dae-Won Mun, Yu-Ho Kim