公开(公告)号：US08689357B2

公开(公告)日：2014-04-01

申请号：US13475947

申请日：2012-05-19

申请人： Mohit Arora ,  Rakesh Pandey ,  Pushkar Sareen ,  Prashant Bhargava

发明人： Mohit Arora ,  Rakesh Pandey ,  Pushkar Sareen ,  Prashant Bhargava

IPC分类号： G06F21/00

CPC分类号： G06F21/72 ,  G06F21/755

摘要： A tamper detector has input and output pins for connection to ends of a tamper detection circuit, and a corresponding set of linear feedback shift registers (LFSRs) timed by clock signals for generating pseudo-random coded detection signals as a function of seed values and of a generator polynomial defined by feedback taps. A comparator compares signals received from the detection circuit with the coded detection signals. A multiplexer provides the coded detection signal selectively from the LFSRs to the output pin and the comparator. A controller varies the seed values for different cycles of values of the pseudo-random coded detection signals. The controller also controls the generator polynomial and a frequency of the clock signals for different cycles of values of the pseudo-random coded detection signals.

摘要翻译： 篡改检测器具有用于连接到篡改检测电路的端部的输入和输出引脚和由时钟信号定时的对应的一组线性反馈移位寄存器（LFSR），用于产生作为种子值的函数的伪随机编码检测信号，以及 由反馈抽头定义的生成多项式。 比较器将从检测电路接收的信号与编码的检测信号进行比较。 复用器将选择性地从LFSR向编码的检测信号提供给输出引脚和比较器。 控制器改变伪随机编码检测信号的不同周期值的种子值。 控制器还控制生成多项式和针对伪随机编码检测信号的不同周期值的时钟信号的频率。

公开(公告)号：US20130312122A1

公开(公告)日：2013-11-21

申请号：US13475947

申请日：2012-05-19

申请人： Mohit Arora ,  Rakesh Pandey ,  Pushkar Sareen ,  Prashant Bhargava

发明人： Mohit Arora ,  Rakesh Pandey ,  Pushkar Sareen ,  Prashant Bhargava

IPC分类号： G06F21/02

CPC分类号： G06F21/72 ,  G06F21/755

摘要： A tamper detector has input and output pins for connection to ends of a tamper detection circuit, and a corresponding set of linear feedback shift registers (LFSRs) timed by clock signals for generating pseudo-random coded detection signals as a function of seed values and of a generator polynomial defined by feedback taps. A comparator compares signals received from the detection circuit with the coded detection signals. A multiplexer provides the coded detection signal selectively from the LFSRs to the output pin and the comparator. A controller varies the seed values for different cycles of values of the pseudo-random coded detection signals. The controller also controls the generator polynomial and a frequency of the clock signals for different cycles of values of the pseudo-random coded detection signals.

摘要翻译： 篡改检测器具有用于连接到篡改检测电路的端部的输入和输出引脚和由时钟信号定时的对应的一组线性反馈移位寄存器（LFSR），用于产生作为种子值的函数的伪随机编码检测信号，以及 由反馈抽头定义的生成多项式。 比较器将从检测电路接收的信号与编码的检测信号进行比较。 复用器将选择性地从LFSR向编码的检测信号提供给输出引脚和比较器。 控制器改变伪随机编码检测信号的不同周期值的种子值。 控制器还控制生成多项式和针对伪随机编码检测信号的不同周期值的时钟信号的频率。