Patents by Inventor Qiuxin Wu

Qiuxin Wu 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 backing up and restoring an encryption key
    Patent number: 8055911
    Abstract: The present invention allows creation of a backup key for backing up an encryption key inside a source trusted chip, encrypting the encryption key with the backup key, exporting the encrypted encryption key from the source trusted chip and storing it in a storage device, encrypting the backup key for transmission to a trusted third party. If the encrypted encryption key needs to be restored inside a destination trusted chip, the backup key and the encryption key encrypted with the backup key are imported to the destination trusted chip, where the encrypted encryption key is decrypted with the backup key inside the destination trusted chip to obtain the encryption key of the source trusted chip.
    Type: Grant
    Filed: December 7, 2005
    Date of Patent: November 8, 2011
    Assignees: Beijing Lenovo Software Ltd., Lenovo (Beijing) Limited
    Inventors: Rongfeng Feng, Ping Yin, Qiuxin Wu
  • Method for Backing Up and Restoring an Encryption Key
    Publication number: 20080192940
    Abstract: The present invention allows creation of a backup key for backing up an encryption key inside a source trusted chip, encrypting the encryption key with the backup key, exporting the encrypted encryption key from the source trusted chip and storing it in a storage device, encrypting the backup key for transmission to a trusted third party. If the encrypted encryption key needs to be restored inside a destination trusted chip, the backup key and the encryption key encrypted with the backup key are imported to the destination trusted chip, where the encrypted encryption key is decrypted with the backup key inside the destination trusted chip to obtain the encryption key of the source trusted chip.
    Type: Application
    Filed: December 7, 2005
    Publication date: August 14, 2008
    Applicants: BEIJING LENOVO SOFTWARE LTD., LENOVO (BEIJING) LIMITED
    Inventors: Rongfeng Feng, Ping Yin, Qiuxin Wu