Gao Yansong, Ranasinghe Damith C, Al-Sarawi Said F, Kavehei Omid, Abbott Derek
1] School of Electrical and Electronic Engineering, The University of Adelaide, SA 5005, Australia [2] Auto-ID Labs, School of Comupter Science, The University of Adelaide, SA 5005, Australia.
Auto-ID Labs, School of Comupter Science, The University of Adelaide, SA 5005, Australia.
Sci Rep. 2015 Aug 4;5:12785. doi: 10.1038/srep12785.
Physical unclonable functions (PUFs) exploit the intrinsic complexity and irreproducibility of physical systems to generate secret information. The advantage is that PUFs have the potential to provide fundamentally higher security than traditional cryptographic methods by preventing the cloning of devices and the extraction of secret keys. Most PUF designs focus on exploiting process variations in Complementary Metal Oxide Semiconductor (CMOS) technology. In recent years, progress in nanoelectronic devices such as memristors has demonstrated the prevalence of process variations in scaling electronics down to the nano region. In this paper, we exploit the extremely large information density available in nanocrossbar architectures and the significant resistance variations of memristors to develop an on-chip memristive device based strong PUF (mrSPUF). Our novel architecture demonstrates desirable characteristics of PUFs, including uniqueness, reliability, and large number of challenge-response pairs (CRPs) and desirable characteristics of strong PUFs. More significantly, in contrast to most existing PUFs, our PUF can act as a reconfigurable PUF (rPUF) without additional hardware and is of benefit to applications needing revocation or update of secure key information.
物理不可克隆函数（PUF）利用物理系统的内在复杂性和不可重复性来生成秘密信息。其优势在于，通过防止设备克隆和密钥提取，PUF有可能提供比传统加密方法更高的安全性。大多数PUF设计专注于利用互补金属氧化物半导体（CMOS）技术中的工艺变化。近年来，诸如忆阻器等纳米电子器件的进展表明，在将电子器件缩小到纳米区域的过程中，工艺变化普遍存在。在本文中，我们利用纳米交叉开关架构中极高的信息密度以及忆阻器显著的电阻变化，开发了一种基于片上忆阻器件的强PUF（mrSPUF）。我们的新颖架构展示了PUF的理想特性，包括唯一性、可靠性以及大量的挑战 - 响应对（CRP），同时也具备强PUF的理想特性。更重要的是，与大多数现有PUF不同，我们的PUF无需额外硬件即可充当可重构PUF（rPUF），这对需要撤销或更新安全密钥信息的应用有益。
