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. 20, 1994
Filed:
Apr. 19, 1993
Applicant:
Inventor:
Adi Shamir, Rehovot, IL;
Assignee:
Yeda Research & Development Co., Ltd., Rehovot, IL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04K / ; H04L / ; H04C / ;
U.S. Cl.
CPC ...
380 30 ; 380 28 ; 380 44 ;
Abstract
A birational permutation is a function f which is a one-to-one and onto mapping over k-tuples of numbers, where both f and its inverse are low degree rational functions. This patent describes a novel digital signature scheme which is based on a new class of birational permutations which have small keys and require few arithmetic operations.