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. 21, 2010
Filed:
Dec. 10, 2003
Applicants:
Christoph Gouguenheim, Moutain View, CA (US);
Kan Zhang, Palo Alto, CA (US);
Salil Pradhan, Santa Clara, CA (US);
Inventors:
Christoph Gouguenheim, Moutain View, CA (US);
Kan Zhang, Palo Alto, CA (US);
Salil Pradhan, Santa Clara, CA (US);
Assignee:
Hewlett-Packard Development Company, L.P., Houston, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04L 9/14 (2006.01); G06F 21/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A secure token includes a processor for protecting a first cryptographic key against unauthorized access, and creating a second cryptographic key from the first key and a message unique to an insecure device. The second key is usable for file decryption by the insecure device.