公开(公告)号：US20030219126A1

公开(公告)日：2003-11-27

申请号：US10388324

申请日：2003-03-12

Applicant: STMicroelectronics SA

Inventor： Sylvie Wuidart

IPC: H04N007/167

CPC classification number: H04K3/41 ,  G06F21/755 ,  G06K19/07363 ,  H01L23/585 ,  H01L24/06 ,  H01L2924/12035 ,  H01L2924/13091 ,  H01L2924/14 ,  H04K3/60 ,  H04K3/825 ,  H04K2203/20 ,  H01L2924/00

Abstract: A method for scrambling current consumption of an integrated circuit, at least during execution of a confidential operation by the integrated circuit that includes reading confidential data stored therein and/or the calculation of an encryption code is provided. The charge pump is activated to generate current consumption fluctuations on the electrical power supply line of the integrated circuit, at an intensity great enough to mask the current consumption variations associated with the execution of the confidential operation.

Abstract translation: 提供一种用于加扰集成电路的电流消耗的方法，至少在由包括读取存储在其中的机密数据和/或加密代码的计算的集成电路执行机密操作期间。 电荷泵被激活以在集成电路的电源线上产生电流消耗波动，强度足以掩盖与执行机密操作相关联的当前消耗变化。

公开(公告)号：US20040028234A1

公开(公告)日：2004-02-12

申请号：US10606161

申请日：2003-06-25

Applicant: STMicroelectronics SA

Inventor： Sylvie Wuidart

IPC: H04K001/00

CPC classification number: G07F7/1008 ,  G06F7/00 ,  G06F21/72 ,  G06F21/75 ,  G06F2207/7223 ,  G06F2207/7266 ,  G06Q20/341 ,  G07F7/082

Abstract: Operation of a logic circuit for performing a desired logic function is scrambled. Logic gates and/or transistors are provided in the logic circuit so that the logic function is performed in at least two different ways. The way in which the logic function is performed is determined by the value of a function selection signal applied to the logic circuit. The function selection signal is random and is applied to the logic circuit, and the function selection signal is refreshed at determined instants for scrambling operation of the logic circuit. For identical data applied at the input of the logic circuit and for different values of the function selection signal, the polarities of certain internal nodes of the logic circuit and/or the current consumption of the logic circuit are not identical.

Abstract translation: 用于执行所需逻辑功能的逻辑电路的操作被加扰。 在逻辑电路中提供逻辑门和/或晶体管，使得以至少两种不同的方式执行逻辑功能。 执行逻辑功能的方式由施加到逻辑电路的功能选择信号的值决定。 功能选择信号是随机的，并且被施加到逻辑电路，并且在确定的时刻刷新功能选择信号以用于逻辑电路的加扰操作。 对于在逻辑电路的输入端应用的相同数据以及功能选择信号的不同值，逻辑电路的某些内部节点的极性和/或逻辑电路的电流消耗不相同。