Far Correlation-based EMA with a precharacterized leakage model
Far Correlation-based EMA with a precharacterized leakage model
复制标题
具有预表征泄漏模型的基于远相关的 EMA
DOI：
10.1109/date.2010.5456906
复制
发表时间：
2010
期刊：
影响因子：
--
通讯作者：
L. Sauvage
中科院分区：
文献类型：
--
作者：
O. Meynard;S. Guilley;J. Danger;L. Sauvage
电磁分析是针对密码设备的重要攻击类别。在本文中，我们证明，基于硬件的高性能AES模块基于电磁分析（CEMA）的相关性可以从50 cm的距离进行。首先，我们表明，当将天线从加密设备移开时，信噪比（SNR）（SNR）趋向于非零限制。对泄漏结构的分析表明，锤距离模型虽然适合小距离时，天线远离设备时会越来越扭曲。由于我们无法设计任何可以预测观测值的物理模型，因此我们使用一阶模板构造对其进行了预先介绍。使用此模型，我们将CEMA提高了十个因素。因此，我们得出的结论是，与我们的扩增策略相连，涉及旨在使参数加权距离泄漏模型的精确系数的创新训练阶段结合起来，EMA是可行的。
Electromagnetic analysis is an important class of attacks against cryptographic devices. In this article, we prove that Correlation-based on ElectroMagnetic Analysis (CEMA) on a hardware-based high-performance AES module is possible from a distance as far as 50 cm. First we show that the signal-to-noise ratio (SNR) tends to a non-zero limit when moving the antenna away from the cryptographic device. An analysis of the leakage structure shows that the Hamming distance model, although suitable for small distances gets more and more distorted when the antenna is displaced far from the device. As we cannot devise any physical model that would predict the observations, we instead pre-characterized it using a first order templates construction. With this model, we enhanced the CEMA by a factor up to ten. Therefore, we conclude that EMA at large distance is feasible with our amplification strategy coupled to an innovative training phase aiming at precharacterizing accurate coefficients of a parametric weighted distance leakage model.