The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 25, 2012
Filed:
Jan. 31, 2008
Zhuqiang Wang, Beijing, CN;
Zhuqiang Wang, Beijing, CN;
Lenovo (Beijing) Limited, Beijing, CN;
Beijing Lenovo Software Ltd., Beijing, CN;
Abstract
A method for guaranteeing the security of critical data, which is used in a terminal including a secured chip and includes the steps of: activating the secured chip by the terminal platform to receive cryptograph A of said critical data; parsing internally by the secured chip the cryptograph A with a preset key A to generate a plaintext, then encrypting said plaintext with a preset key B to generate cryptograph B, and returning the cryptograph B to the terminal platform. Since cryptograph conversion is performed inside the secured chip, and the process of converting the cryptograph A to the cryptograph B is completed inside the secured chip as a one-shot action, the secured chip cannot be eavesdropped upon or stolen by any vicious software, and thus the critical data is guaranteed to be always in a cryptograph status from the secured input device to the remote server, which ensures the security of the critical data. In addition, the present invention is low in cost, advantageous in spreading and application, and convenient in customization and upgrading. The present invention further provides a terminal and a secured chip.