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A 354 F2 Leakage-Based Physically Unclonable Function With Lossless Stabilization Through Remapping for Low-Cost IoT Security Jongmin Lee , Student Member , IEEE, Donghyeon Lee, Student Member , IEEE, Yongmin Lee, Student Member , IEEE
提出一种基于泄漏电流的物理不可克隆函数(PUF)，通过阈值电压变化生成密钥，面积仅354F²，并采用无损稳定化方案提升稳定性。
354F²面积，3.87%原生不稳定比特率(UBR)，0.426%原生误码率(BER)，优化后BER 47ppm，UBR 538ppm
物理不可克隆函数物联网安全泄漏电流阈值电压变化无损稳定化
▸利用亚阈值泄漏电流的指数依赖性生成密钥
▸提出无损稳定化方案“重映射”
▸结合11位时序多数表决显著提升稳定性
Abstract
A leakage-based physically unclonable func- tion (PUF) is proposed to provide cost-effective security for Internet of Things (IoT) devices. By exploiting the exponential dependence of subthreshold leakage current on a transistor’s threshold voltage variations, a response key bit is generated with only 354 F 2 silicon area. Moreover, to improve stability without discarding challenge-response pairs (CRPs), a novel lossless stabilization scheme called “remapping” is proposed. The proposed leakage-based PUF exhibited a 3.87% native unstable bit ratio (UBR) and 0.426% native bit error rate (BER). With the proposed remapping and 11-bit temporal majority voting applied, the BER and UBR are significantly improved to 47 and 538 ppm, respectively, achieving stability as high as a conventional trimming approach without any key losses.