论文标题
物理时间变化的转移功能作为通用的低空电源-SCA对策
Physical Time-Varying Transfer Functions as Generic Low-Overhead Power-SCA Countermeasure
论文作者
论文摘要
在物理平台上实现时，数学安全的加密算法通过其电源泄漏了重要的侧渠道信息。攻击者可以利用这些侧通道泄漏来提取嵌入式设备的秘密钥匙。现有的最先进的对策主要集中于使用噪声注入和签名衰减的功率平衡，门级掩盖或减少信噪比（SNR），所有这些都遭受了高功率/区域高架的限制，性能降低的限制，或者是不可合成的。在本文中，我们提出了一个通用的低空数字友好型功率SCA对策，利用物理变化的转移功能（TVTF）随机洗牌分布式切换电容器，以显着混淆时间域中的痕迹。 TSMC 65NM CMOS技术实施的TVTF-AES的系统级仿真结果> 4000x MTD改进了未受保护的实施，具有接近1.25倍的功率和1.2倍的面积，而没有任何性能降级。
Mathematically-secure cryptographic algorithms leak significant side channel information through their power supplies when implemented on a physical platform. These side channel leakages can be exploited by an attacker to extract the secret key of an embedded device. The existing state-of-the-art countermeasures mainly focus on the power balancing, gate-level masking, or signal-to-noise (SNR) reduction using noise injection and signature attenuation, all of which suffer either from the limitations of high power/area overheads, performance degradation or are not synthesizable. In this article, we propose a generic low-overhead digital-friendly power SCA countermeasure utilizing physical Time-Varying Transfer Functions (TVTF) by randomly shuffling distributed switched capacitors to significantly obfuscate the traces in the time domain. System-level simulation results of the TVTF-AES implemented in TSMC 65nm CMOS technology show > 4000x MTD improvement over the unprotected implementation with nearly 1.25x power and 1.2x area overheads, and without any performance degradation.
