基于DPA的LED非线性部件逆向研究

在军事和商业应用中有很多密码算法是半公开或者不公开的，旨在证明算法保密对密码的安全性提高并没有明显帮助．针对轻型分组密码LED的未知非线性部件S盒，提出了一种基于差分功耗分析的逆向方法，该方法可以利用差分功耗曲线的极性信息来恢复未知算法结构．实验结果表明，在LED的S盒参数未知时，利用功耗采集平台采集算法运行时泄露的旁路功耗信息，可以成功逆向出全部s盒信息，验证了该方法的可行性．

DPA based Reverse Engineering against LED Nonlinear Operation

Many ciphers used in military and business affairs are secret or semi-secret. The purpose of this paper is to show that secret algorithms offer very little protection. This paper proposes a reverse engineering method based on differential power analysis against LED unknown S box, which can get the unknown parameters of S box using the sign of the differential power traces. Experimental results show that this method can reverse the LED S box with the power leakage which is collected by power information acquisition platform. The feasibility of this method is proved by this experiment.