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:
Sep. 03, 2002
Filed:
Dec. 10, 1998
Applicant:
Inventor:
Arjen K. Lenstra, Mendham, NJ (US);
Assignee:
Citibank, N.A., New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L 9/00 ;
U.S. Cl.
CPC ...
H04L 9/00 ;
Abstract
Participants in a cryptosystem select their own elliptic curve and finite field, rather than using a centrally chosen elliptic curve. The curve is chosen from a predetermined set of elliptic curves expressed as Weierstra&bgr; model equations. The public key is based on a participant's unique ID, which must be exchanged during communication setup for non-cryptographic reasons, and a randomly chosen bitstring having a length based on security considerations. The public key can be readily constructed from parameters and mapping functions which are known system-wide and from a small amount of participant dependent data.