专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

21. 发明公开

EP1277307A1 PROCEDE DE CRYPTOGRAPHIE SUR COURBES ELLIPTIQUES 审中-公开
公开(公告)号：EP1277307A1
公开(公告)日：2003-01-22
申请号：EP01927999.1
申请日：2001-04-18
申请人： GEMPLUS
发明人： CORON, Jean-Sébastien , TYMEN, Christophe
IPC分类号： H04L9/30 , G06F7/72
CPC分类号： H04L9/3066 , G06F7/725 , H04L9/0841 , H04L9/3252 , H04L2209/08
摘要： The invention concerns a cryptography method for generating probabilistic digital signatures and/or for a key-exchange a protocol and/or for an encryption algorithm, said method being based on the use of a public key algorithm on abnormal binary elliptic curve (E) (Koblitz curve) whereon a point P (x, y) is selected, pairs (ki, Pi) being stored with Pi the point corresponding to the scalar multiplication of the point P by ki, said method comprising steps which consist in generating a random variable (k) and in calculating a point C corresponding to the scalar multiplication of P by k (C = k.P). The invention is characterised in that the generation of said random variable (k) and the calculation of the point C are performed simultaneously.
摘要翻译：本发明涉及用于产生概率数字签名和/或用于密钥交换协议和/或用于加密算法的密码方法，所述方法基于在异常二进制椭圆曲线（E）上使用公钥算法（ Koblitz曲线），其上选择点P（x，y），将对（ki，Pi）与Pi一起存储，该点对应于点P的标量乘ki，所述方法包括以下步骤：生成随机变量（k）并计算对应于P的标量乘以k（C = kP）的点C. 本发明的特征在于，同时执行所述随机变量（k）的生成和点C的计算。

22. 发明公开

EP1224765A1 PROCEDE DE CONTRE-MESURE DANS UN COMPOSANT ELECTRONIQUE METTANT EN OEUVRE UN ALGORITHME DE CRYPTOGRAPHIE A CLE PUBLIQUE DE TYPE RSA 有权
标题翻译：反对行动电子模块用于承载KRYPTO公钥算法RSA BY TYPE
公开(公告)号：EP1224765A1
公开(公告)日：2002-07-24
申请号：EP00971463.5
申请日：2000-10-13
申请人： GEMPLUS
发明人： CORON, Jean-Sébastien , PAILLIER, Pascal
IPC分类号： H04L9/30
CPC分类号： H04L9/003 , H04L9/302 , H04L2209/08
摘要： The invention relates to a countermeasure method in an electronic component which uses an RSA-type public key cryptographic algorithm. A first countermeasure method consists of using a random calculation for each new execution of the decryption algorithm with CRT. The calculations are made modulo p*r and q*r, r and t being random numbers. A second countermeasure consists of making the recombination random using the CRT theorem.

23. 发明公开

EP1222528A1 PROCEDE D'AMELIORATION DE PERFORMANCE DE L'OPERATION DE MULTIPLICATION SUR UN CORPS FINI DE CARACTERISTIQUE 2 有权
标题翻译：方法用于改善乘法性能有限域的代码2
公开(公告)号：EP1222528A1
公开(公告)日：2002-07-17
申请号：EP00951657.6
申请日：2000-07-12
申请人： Gemplus
发明人： CORON, Jean-Sébastien , HAN, Yong-Fei , ZHANG, Jiang
IPC分类号： G06F7/72
CPC分类号： G06F7/724 , G06F7/725
摘要： Elliptic curve-based algorithms are public key algorithms having over RSA the advantage of less computing time and smaller sized keys. Their implementation in a smart card environment requires efficient algorithm computation. The inventive method consists in a method for rapid calculation of the operation for multiplying co-ordinates of a point pertaining to an elliptic curve.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式