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:
Feb. 28, 2012
Filed:
Apr. 14, 2009
Applicant:
David Chaum, Sherman Oaks, CA (US);
Inventor:
David Chaum, Sherman Oaks, CA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 11/00 (2006.01); G07C 13/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
An improved paper ballot voting system allows voters to verify that their ballots are correctly counted and provide substantiating evidence if they are not. Codes are revealed to voters by the act of marking the ballot during voting and voters can check that these codes are posted. If these codes are not posted as marked, voters can make the codes they obtained public. These codes made public by voters can be compared against codes that were cryptographically committed to in advance of the election. If the codes from voters do in fact match codes committed to, evidence of incorrectness of the vote tallying is provided.