Patent · US Expired

Method and device for cryptographic processing with the aid of an elliptic curve on a computer

US6956946B1 · kind B1 · utility

3Cited by

2References

13Claims

0Family size

Assignee

Infineon Technologies AG · DE

Inventors

Erwin Hess · Ottobrunn, DE
Jean Georgiades · Birkenfeld, DE

Key dates

Filing date	Aug 18, 2000
Grant date	Oct 18, 2005
Priority date	—
Expiry date	Sep 3, 2023

Classification

Technology area (CPC H)Electricity
CPC primaryH04L9/3066
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

In the case of cryptographic processing with the aid of an elliptic curve, parameters of the elliptic curve are stored in a memory of a computer. These parameters are each of substantial length. The elliptic curve is transformed in order to shorten at least one parameter significantly in length and to ensure that the high security level is unchanged in the process. One parameter is preferably shortened to 1, −1, 2 or −2 with the aid of an algorithm, whereas the other parameters have a length of several 100 bits. The shortening of even one parameter is clearly reflected in the case of devices which have little memory space.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.