一种面向PUF的模糊提取器设计与实现

Design and implementation of fuzzy extractor for PUF

基于SRAM等方案实现的物理不可克隆函数(PUF)易于受电压变化、热噪声等环境因素影响,存在可复现性较差的内在缺点,因此极大限制了其在密码和通信等领域的应用。借助BCH码的精确纠错译码特性,设计了一种具有大纠错容量的模糊提取器,用于实现SRAM原始数据的重建。搭载本设计的SRAM PUF芯片在华虹宏力0.11μm CMOS平台制造,模糊提取器部分消耗面积为306267μm 2,搭载的本源BCH码具有127 bit的码长和27 bit的纠错能力,满足PUF的实际应用需求。

The physical unclonable function(PUF)implemented on SRAM and other schemes exists inherent demerit of poor reproducibility for environmental factors such as voltage changes and thermal noise.This disadvantage greatly restricts functional application in cryptography,communication and other fields.In this paper,a fuzzy extractor with large error correction capacity is designed to reconstruct the original data of SRAM by means of BCH codes(Bose-Chaudhuri-Hocquenghem Codes).The SRAM PUF chip applying this design is manufactured on the Hua Hong Grace 0.11μm CMOS platform with area of 306267μm 2.The original BCH code has a code length of 127 bits and an error correction capability of 27 bits,which achieves the practical requirements of PUF applications.