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:
Apr. 13, 2010
Filed:
Jul. 21, 2003
Applicants:
Kevin E. Fu, Cambridge, MA (US);
Mahesh Kallahalla, Palo Alto, CA (US);
Ram Swaminathan, Cupertino, CA (US);
Inventors:
Kevin E. Fu, Cambridge, MA (US);
Mahesh Kallahalla, Palo Alto, CA (US);
Ram Swaminathan, Cupertino, CA (US);
Assignee:
Hewlett-Packard Development Company, L.P., Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L 9/00 (2006.01); H04N 7/167 (2006.01); H04L 9/32 (2006.01); G06F 21/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
Windowed backward key rotation. A user is provided information that allows determining a limited number of previous keys in a series of keys from a later key in the series. A key in the series is generated, based at least in part on the information provided to the user. The key in the series is provided to the user. The user determines at least one key in the limited number of previous keys in the series by applying the information to the key in the series.