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首页> 外文期刊>Journal of Low Power Electronics >Power Consumption versus Hardware Security: Feasibility Study of Differential Power Attack on Linear Feedback Shift Register Based Stream Ciphers and Its Countermeasures
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Power Consumption versus Hardware Security: Feasibility Study of Differential Power Attack on Linear Feedback Shift Register Based Stream Ciphers and Its Countermeasures

机译：功耗与硬件安全性：基于线性反馈移位寄存器的流密码差分功率攻击的可行性研究及对策

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摘要

This paper demonstrates a trade off between the security of a crypto-system and its power consumption. Digital stream ciphers are extensively employed in Crypto-systems. Many of them use linear feedback shift registers (LFSRs) as building blocks, wherein, an n-degree primitive connection polynomial is used as a feedback function to realize an n-bit LFSR. Using finite-field theory and electromagnetic-circuit theory, we show that such LFSRs are susceptible to differential power attacks (DPAs), without the adversary's prior knowledge of the primitive polynomial. It is interesting to note that the DPA becomes more prominent with technology scaling due to increased contribution of local interconnect to total power. The paper also presents two countermeasures for the proposed DPA that results in a trade off with power consumption. With the growing need for crypto-systems in low-power Internet-of-Things (IoTs) devices, this case study highlighting a power-security trade off is of great significance.
机译：本文演示了密码系统的安全性与功耗之间的权衡。数字流密码广泛用于加密系统中。他们中的许多人将线性反馈移位寄存器（LFSR）用作构建块，其中，将n度基元连接多项式用作反馈函数以实现n位LFSR。使用有限域理论和电磁电路理论，我们证明了这种LFSR易受差分功率攻击（DPA）的影响，而无需对手事先掌握原始多项式的知识。有趣的是，由于本地互连对总功率的贡献增加，DPA在技术扩展方面变得更加突出。本文还针对提出的DPA提出了两种对策，这些对策导致了功耗的折衷。随着低功耗物联网（IoT）设备中对加密系统的需求不断增长，此案例研究突显了电源安全性的权衡意义重大。

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