Self-Programmable Twin PUFs via Photovoltaic Energy Harvesting During the Pre-Wafer-Dicing Stage

📋 论文概要

本文提出一种在晶圆切割前阶段通过光伏能量收集实现自编程的双物理不可克隆函数（PUF）。两个相邻PUF在氧化物击穿过程中共享熵，从而实现无需预存秘密的相互认证，并使用低成本LED验证了晶圆级批量处理的可行性。

💡 主要创新点

• 首次提出在晶圆切割前阶段利用光伏能量收集进行PUF的自编程，无需外部电源即可生成密钥。
• 通过两个相邻PUF共享氧化物击穿熵，实现无需预存秘密的相互认证，提升安全性。
• 使用低成本LED实现晶圆级批量处理，降低了制造复杂度和成本。

🏷 关键词

📄 原文摘要

Abstract We present a CMOS self-programmable twin PUF which can be formed at the pre-waferdicing stage via photovoltaic harvesting. Two adjacent PUFs share entropy during oxide breakdown, enabling mutual authentication without pre-stored secrets. The prototype is implemented with twin PUF macros with a 128%8 array and achieves 98.4% pairwise consistency with 0.4% native BER. Using a low-cost LED, we demonstrate photovoltaic twin-PUF generation, confirming wafer-level batch processing feasibility. Physical Unclonable Functions (PUFs) offer hardware-intrinsic variations to enable secure key storage and authentication without reliance on a dedicated non-volatile memory process [1,2]. After fabrication, the challenge–response pairs (CRPs) of the PUF device are measured and pre-stored for future authentications. Such an enrollment process, however, increases the risk of secret leaks, which is particularly the case for lightweight edge devices since a

👥 作者与机构

Eunseok Lee, Jaehong Jung, Maitreyi Ashok, Anantha P. Chandrakasan, Ruonan Han

Massachusetts Institute of Technology, Cambridge, MA