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:
Dec. 25, 2007
Filed:
Jan. 31, 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:
Assistant Examiner:
Int. Cl.
CPC ...
H04L 9/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method and system for relating cryptographic keys. A method includes providing to a user a private share related to a key. The method also includes generating a new key based on a previous version of the key and publishing a rotation catalyst. The new version of the key is determinable based on the key rotation catalyst and the private share. Further, former versions of the key are determinable based on the key rotation catalyst.