基于电流补偿电路的密码芯片抗功耗攻击设计

摘要

为了建立具有普适性的功耗攻击防御单元,从系统级功耗恒定设计思想出发,设计一种电流补偿电路.首先,通过构建高线性转换Ⅰ→Ⅴ模块和Ⅴ→Ⅰ模块,实现准确模拟出密码算法IP核动态电流变化的功能;其次,通过电路的对称性设计,使得电流和电压变化相互补偿,抑制温度漂移效应对电流补偿电路的影响;最后,通过UhraSim仿真评估其抗功耗攻击效果,并分析其面积消耗.%In order to design high universality units to resist ant power attack, a current compensation circuit is designed from the view of power consumption constant in system-level.Firstly, a high linearity Ⅰ→Ⅴ transformation module and a high linearity Ⅴ→Ⅰ transformation module is constructed, which realizes the function of accurate copying the current variation of cipher algorithm IP core.Secondly, the changes in current and voltage do compensate based on the symmetrical design, which inhibit the effect of temperature drift to current compensation circuit.Finally, the UltraSim simulation evaluates the effect of resisting power attack of this design, and analyzes the area consumption.