Patents by Inventor Liu Zunquan

Liu Zunquan 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).

  • Device and method for data integrity and authentication
    Patent number: 6041409
    Abstract: Various aspects of data security such as validation, authentication and encryption are accomplished by the combinations of encoding and decoding employing a mapping or inverse mapping controllable by a key k, between a source document x and a transformed document y or a highly compressed transformed document v. In the preferred embodiment, a single mapping module is the basis for an expedient and economic implementation of a unified and comprehensive data security system.
    Type: Grant
    Filed: April 14, 1998
    Date of Patent: March 21, 2000
    Inventor: Liu Zunquan
  • Device and method for data integrity and authentication
    Patent number: 5771292
    Abstract: Various aspects of data security such as validation, authentication and encryption are accomplished by the combinations of encoding and decoding employing a mapping or inverse mapping controllable by a key k, between a source document x and a transformed document y or a highly compressed transformed document v. In the preferred embodiment, a single mapping module is the basis for an expedient and economic implementation of a unified and comprehensive data security system.
    Type: Grant
    Filed: April 25, 1997
    Date of Patent: June 23, 1998
    Inventor: Liu Zunquan