公开(公告)号：US20130077781A1

公开(公告)日：2013-03-28

申请号：US13615251

申请日：2012-09-13

Applicant: Joan Daemen ,  Jean-Louis Modave ,  Michel Dawirs

Inventor： Joan Daemen ,  Jean-Louis Modave ,  Michel Dawirs

IPC: H04L9/00

CPC classification number: H04L9/003 ,  H04L9/0861 ,  H04L9/0891 ,  H04L2209/12

Abstract: A method of derivation, by an electronic circuit, of a first key from a second key, wherein: at least one third key is derived from the second key and is used to derive the first key; and a value of a counter, representative of the number of first keys, conditions the derivation of a new value of the third key.

Abstract translation: 一种通过电子电路从第二密钥推导第一密钥的方法，其中：从所述第二密钥导出至少一个第三密钥，并用于导出所述第一密钥; 代表第一密钥数量的计数器的值，条件是导出第三密钥的新值。

公开(公告)号：US07516902B2

公开(公告)日：2009-04-14

申请号：US11283096

申请日：2005-11-18

Applicant: Jean-Louis Modave

Inventor： Jean-Louis Modave

IPC: G06K19/06

CPC classification number: G06F21/52 ,  G06F21/55 ,  H04W12/12

Abstract: A method for protecting at least one section of a program executed by a microcontroller, included before execution of the section, decrementing or incrementing at least one first counter and storing its state in a non-volatile memory of the microcontroller; in case of the detection of an attack attempt by the microcontroller, activating a flag in the microcontroller RAM; and at the end of the execution of the program section, checking the flag state.

Abstract translation: 一种用于保护由微控制器执行的程序的至少一个部分的方法，包括在执行该部分之前，递减或递增至少一个第一计数器并将其状态存储在微控制器的非易失性存储器中; 在检测到微控制器的攻击尝试的情况下，激活微控制器RAM中的标志; 并在程序段执行结束时检查标志状态。