A 553F2 2-Transistor Amplifier-Based Physically Unclonable Function (PUF) with 1.67% Native Instability

📋 论文概要

这篇论文提出了一种基于2晶体管放大器的物理不可克隆函数（PUF）单元，实现了仅553F2的极小面积和1.67%的低原生不稳定性，解决了PUF在安全应用中面积大、稳定性差的问题。

💡 主要创新点

• 首次采用2晶体管放大器结构作为PUF单元，大幅缩小面积至553F2，突破了传统PUF的面积瓶颈。
• 实现了1.67%的超低原生不稳定性，无需纠错或屏蔽电路即可保持高可靠性。

🏷 关键词

📄 原文摘要

Physically Unclonable Functions (PUFs) are among the most promising security primitives for low cost solutions of key storage, chip authentication, and supply chain protection. Two types of PUFs exist in literature [1-6], a “strong” PUF with a large challenge-response space [6] and a “weak” PUF providing a limited length key (chip ID) [1-5]. While the former provides better security theoretically, existing implementations are prone to modeling attacks. So-called “weak” PUFs typically have an array of identically designed PUF cells that leverage device mismatch in fabrication as static entropy source, and serve as a low-cost and more secure alternative to non-volatile-memory-based key storage. Output stability across PVT variations and area are two critical metrics directly related to security and cost of a PUF. Recent works have presented custom PUFs based on NAND gates [1], current mirrors [2], PTAT [3], and cross-coupled inverters [4-5]. These

👥 作者与机构

Kaiyuan Yang, Qing Dong, David Blaauw, Dennis Sylvester

University of Michigan, Ann Arbor, MI