公开(公告)号：US07403620B2

公开(公告)日：2008-07-22

申请号：US10611254

申请日：2003-07-01

申请人： Pierre-Yvan Liardet ,  Fabrice Romain ,  Yannick Teglia ,  Laurence Sirtori

发明人： Pierre-Yvan Liardet ,  Fabrice Romain ,  Yannick Teglia ,  Laurence Sirtori

IPC分类号： H04L9/00

CPC分类号： H04L9/0631 ,  H04L9/003 ,  H04L2209/046 ,  H04L2209/08

摘要： A method of cyphering and/or decyphering, by an integrated circuit, of a digital input code by means of several keys, comprising: dividing the code into several data blocks of same dimensions; and applying to said blocks several turns of a cyphering or decyphering comprising submitting each block to at least one same non-linear transformation and of subsequently combining each block with a different key at each turn, the operands being masked, upon execution of the method, by at least one first random number having the size of the code and all the blocks of which have the same value by combining, by an XOR-type function, the input and output blocks of the non-linear transformation with said random number.

摘要翻译： 一种通过集成电路对几个键进行数字输入代码的连接和/或解粘的方法，包括：将代码划分成相同尺寸的多个数据块; 以及向所述块应用多个匝数或次衰减，包括将每个块提交至少一个相同的非线性变换，并且随后在每一匝上将每个块与不同的密钥组合，所述操作数被屏蔽，在执行该方法时， 通过由XOR类型函数组合具有所述随机数的非线性变换的输入和输出块的具有代码大小和其所有块具有相同值的至少一个第一随机数。