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:
Feb. 26, 2013
Filed:
Jan. 04, 2012
Randall R. Spangler, San Jose, CA (US);
William F. Richardson, Santa Clara, CA (US);
Sumit Gwalani, Sunnyvale, CA (US);
Luigi Semenzato, Oakland, CA (US);
William A. Drewry, Nashville, TN (US);
Randall R. Spangler, San Jose, CA (US);
William F. Richardson, Santa Clara, CA (US);
Sumit Gwalani, Sunnyvale, CA (US);
Luigi Semenzato, Oakland, CA (US);
William A. Drewry, Nashville, TN (US);
Google Inc., Mountain View, CA (US);
Abstract
A system and method is disclosed for locking down a capability of a computer system. Hardware instructions initiate a sequence of boot cycles to launch a computer operating system on a computer-enabled device. During the boot cycles, multiple levels of boot code are verified. Each verified stage of boot code verifies a subsequent stage of boot code. If the subsequent stage of boot code cannot be verified, the verified stage locks a capability of the computer so that the subsequent stage of boot code cannot modify the capability.