Secure AES Engine with A Local Switched-Capacitor Current Equalizer

📋 论文概要

该论文提出了一种带有本地开关电容电流均衡器的安全AES引擎，通过平衡电路中的电流消耗来抵御差分功耗分析（DPA）攻击，从而保护加密设备的密钥不被侧信道攻击泄露。

💡 主要创新点

• 提出了一种本地开关电容电流均衡器，能够动态补偿AES引擎在不同操作下的电流变化，使功耗曲线趋于平坦。
• 实现了对DPA攻击的有效防御，同时保持了AES加密的高吞吐量和低延迟。

🏷 关键词

📄 原文摘要

Hardware implementations of the popular AES encryption algorithm [1,2] provide attackers with important side-channel information (delay, power consumption or EM radiation) that can be used to disclose the secret key of the encryption device. Differential power analysis (DPA) [3-5] is one of the most common side-channel attacks because of its simplicity and effectiveness (Fig. 3.5.1). It performs a statistical analysis of supply-current measurements and either the plaintext or ciphertext to disclose the secret key. These two elements can be easily recorded externally without probing internal signals on the chip. Either the plaintext or ciphertext is used to build a model of the current consumption (e.g., during 0 to 1 transition) using knowledge of the AES algorithm and a key guess. By calculating the correlation between the model and the measured current for each possible key guess the key is discovered. In the

👥 作者与机构

Carlos Tokunaga, David Blaauw

University of Michigan, Ann Arbor, MI