公开(公告)号：US20040193890A1

公开(公告)日：2004-09-30

申请号：US10761040

申请日：2004-01-20

Applicant: France Telecom

Inventor： Marc Girault

IPC: H04L009/00

CPC classification number: G07F7/1008 ,  G06Q20/341 ,  G06Q20/3674 ,  G06Q20/40975 ,  H04L9/0662 ,  H04L9/3066 ,  H04L9/3236 ,  H04L2209/56

Abstract: An asymmetrical cryptographic method of protecting an electronic chip against fraud in transactions between the electronic chip and an application, involving calculating an authentication value V from input parameters in the electronic chip. The chip produces a pseudo-random number r specific to the transaction by means of a serial pseudo-random generator included in the chip. The chip sends the application a parameter x calculated by the application prior to the transaction, linked to the random number r by a mathematical relationship, and stored in a data memory of the chip. The chip calculates a parameter y constituting the whole or a portion of the authentication value V by means of a serial function whose input parameters are at least the random number r specific to the transaction and a private key s belonging to an asymmetrical pair of keys. The chip sends the authentication value V to the application, and the application verifies the authentication value V by means of a verification function whose input parameters consist exclusively of public parameters including at least the public key p.

Abstract translation: 一种用于保护电子芯片免受电子芯片与应用之间交易中的欺诈的不对称密码方法，包括从电子芯片中的输入参数计算认证值V. 芯片通过芯片中包含的串行伪随机发生器产生特定于交易的伪随机数r。 该芯片向应用发送由事务之前的应用计算的参数x，通过数学关系链接到随机数r，并存储在芯片的数据存储器中。 芯片通过串行功能计算构成整个或一部分认证值V的参数y，该串行功能的输入参数至少为事务所特有的随机数r和属于非对称键的私钥。 芯片将认证值V发送到应用程序，并且应用程序通过验证功能验证认证值V，该验证功能的输入参数仅包括至少包括公钥p的公共参数。