一种低成本物理不可克隆函数结构的设计实现及其RFID应用

Design and Implementation of a Low-Cost Physical Unclonable Function and Its Application in RFID

物理不可克隆函数(PUF:Physical Unclonable Function)是一种新型的加密组件,具有防伪、不可克隆及不可预测等特性.本文提出了一种新型的低成本PUF,与传统PUF相比更适用于无线射频识别(Radio Frequency Identification,RFID)系统.该PUF结构主要由上电密钥生成器和混合函数两部分构成.上电密钥生成器由比特生成器阵列构成,混合函数则由低成本流加密算法构成,其作用是隐藏密钥生成器,以提高安全性.此外,本文还提出了择多模块和多寻认证协议来改善PUF响应及其在RFID系统中的稳定性.实验表明,该PUF的硬件成本低并且具有很好的稳定性,非常适用于RFID系统等资源受限的应用场合.

Physical unclonable function （PUF）is a kind of new encryption primitive,which has the properties of an-ti-counterfeiting,unclonability and unpredictability.In this paper,a low-cost PUF design is presented along with its applica-tion into RFID systems.The PUF structure includes two parts：a key generator and a low-cost stream cipher that is used to hide the key.A novel post-processing module i.e.,majority voting,and a new multi-query protocol are introduced to im-prove the stability and reliability.The proposed reliable and low-cost PUF solution is well suitable for RFID applications.