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. 29, 2009
Filed:
Dec. 11, 2000
Applicants:
Rosario Gennaro, Bronx, NY (US);
Charles Tresser, Mamaroneck, NY (US);
Inventors:
Rosario Gennaro, Bronx, NY (US);
Charles Tresser, Mamaroneck, NY (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04L 9/00 (2006.01); H04L 9/32 (2006.01); G06F 7/04 (2006.01); H04K 1/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method and system for establishing and managing digital cash. This method is to emit and circulate secure electronic cash that allows to use non-homomorphic signature schemes, and avoids having to use blind signature techniques. With one specific embodiment, the method provides anonymous digital cash, and comprises the steps of providing an entity with a secure coprocessor, a user establishing a secure channel to a program running on said coprocessor, and the user sending a coin to be digitally signed to the coprocessor.