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:
Aug. 12, 2008
Filed:
Oct. 14, 2003
Richard M. Butler, Fort Collins, CO (US);
Richard M. Butler, Fort Collins, CO (US);
Hewlett-Packard Development Company, L.P., Houston, TX (US);
Abstract
In one embodiment, values are retrieved from a number of MISRs which are coupled to a number of microprocessor buses, and a random number is generated based on the retrieved values. In another embodiment, a built-in self-test (BIST) local block of a microprocessor is assigned a major address, and each of a number of multiple input shift registers (MISRs) in the BIST local block is assigned a minor address. An instruction to turn on and initialize the MISRs is then issued, and a request to read the MISRs is issued in response to a request for an encryption key. The MISR readings are then XORed with each other, and with historical readings, if any, to generate an encryption key.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile