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:
Mar. 12, 2013
Filed:
Sep. 05, 2007
Satoshi Obana, Tokyo, JP;
Satoshi Obana, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
There is disclosed a system for identifying falsified secret information shares included in k secret information shares used to recover secret information according to a (k,n)-threshold secret sharing scheme, and producing falsified secret information shares of reduced size. A shared information generating apparatus generates cheater identifying information Ai(i=1, 2, . . . , n) using n secret information shares Vi generated according to the (k,n)-threshold secret sharing scheme and random polynomials. A recovering apparatus detects cheated secret information shares using the arbitrary k secret information shares and k cheater identifying information, and recovers the secret information from the k secret information shares if it detects no cheated secret information shares.