公开(公告)号：AT245875T

公开(公告)日：2003-08-15

申请号：AT99914397

申请日：1999-02-02

Applicant: INFINEON TECHNOLOGIES AG

Inventor： HESS ERWIN ,  GEORGIADES JEAN

IPC: G09C1/00 ,  G06F7/72 ,  H04L9/30

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.

公开(公告)号：ES2204117T3

公开(公告)日：2004-04-16

申请号：ES99914397

申请日：1999-02-02

Applicant: INFINEON TECHNOLOGIES AG

Inventor： HESS ERWIN ,  GEORGIADES JEAN

IPC: G09C1/00 ,  G06F7/72 ,  H04L9/30

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.

公开(公告)号：CA2321478A1

公开(公告)日：1999-08-26

申请号：CA2321478

申请日：1999-02-02

Applicant: INFINEON TECHNOLOGIES AG

Inventor： GEORGIADES JEAN ,  HESS ERWIN

IPC: G09C1/00 ,  G06F7/72 ,  H04L9/30

Abstract: In elliptic curve cryptographic processing, the elliptic curve parameters are stored in the memory of a computer. These parameters are considerably long. In order to reduce the length of at least one parameter while maintaining a high degree of security, the elliptic curve is transformed. A parameter is shortened, preferably to 1, -1, 2 or -2, while the other parameters are several hundred bits long. Precisely in the case of chip cards, which have little storage space, even a single shortened parameter can already have a distinct effect.

公开(公告)号：DE59906358D1

公开(公告)日：2003-08-28

申请号：DE59906358

申请日：1999-02-02

Applicant: INFINEON TECHNOLOGIES AG

Inventor： HESS ERWIN ,  GEORGIADES JEAN

IPC: G09C1/00 ,  G06F7/72 ,  H04L9/30

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.

公开(公告)号：BR9908095A

公开(公告)日：2000-10-31

申请号：BR9908095

申请日：1999-02-02

Applicant: INFINEON TECHNOLOGIES AG

Inventor： HESS ERWIN ,  GEORGIADES JEAN

IPC: G09C1/00 ,  G06F7/72 ,  H04L9/30

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.