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. 15, 2011
Filed:
Sep. 14, 2007
Laurie E. Law, New Market, MD (US);
Brian J. Matt, Riva, MD (US);
Laurie E. Law, New Market, MD (US);
Brian J. Matt, Riva, MD (US);
The United States of America as represented by the Director, National Security Agency, Washington, DC (US);
Sparta, Inc., Lake Forest, CA (US);
Abstract
Method of identifying invalid digital signatures involving batch verification by receiving digital messages, digital signatures, and signer identifiers, computing Zas a function of the received information, and determining if the digital signatures are valid. If so, stopping. If not, assigning a signature identifier to each digital signature, setting w equal to 1, computing Zas a function of the received information and signature identifiers, and searching for a multiplicative relationship amongst Z, Z, . . . , Z. If one is found then determining the invalid digital signatures from the multiplicative relationship and stopping. Otherwise, incrementing w and returning to the step of computing for additional processing if desired.