基于纠错码模糊提取器的SRAM-PUF设计方法

Design Method of SRAM-PUF Based on Error Correcting Code Fuzzy Extractor

物理不可克隆函数(Physical Unclonable Function,PUF)是新型的硬件安全技术,利用芯片的"物理指纹"特征实现密钥生成和身份认证等不同功能。提出了一种基于纠错码技术的模糊提取器,用于提高SRAM类PUF的鲁棒性。模糊提取器工作分为生成阶段和重构阶段,生成阶段利用BCH编码产生与PUF响应相关的辅助数据,重构过程利用辅助数据和BCH码的纠错功能重建PUF的稳定响应输出。模糊提取器在ATSAMV70J19处理器上进行实验,在不同的工作温度条件下,其一致性指标可达到99.9%,验证了该方法的有效性。

Physical unclonable function is a new kind of hardware security technology.The physical fingerprint characteristics of the chip are used in many fields such as key generation and identity authentication.The fuzzy extractor based on error correcting code was proposed in this paper to improve the robustness of PUF of SRAM.The working process of fuzzy extractor can be divided into two stages,generation stage and reconfiguration stage.The supplementary data of PUF is created by using BCH encoder method in generation stage.And the stable response output of PUF is created by using supplementary data and the error correcting ability of BCH encoder in reconfiguration stage.The fuzzy extractor experiment is running on ATSAMV70J19 CPU platform and the consistency reaches 99.9% under different operating temperatures.The result of experiment verifies the excellent performance of this method.