中文摘要：

物理不可克隆函数（Physical Unclonable Function,PUF）电路利用结构完全相同的电路在制造过程中存在的随机工艺偏差,产生具有唯一性、随机性和不可克隆性的密钥。该文通过对共源共栅电流镜的研究,提出一种基于电流镜工艺偏差的多端口可配置PUF电路。该PUF电路由输入寄存器、偏差电压源、复用网络、判决器阵列和扰乱模块构成,通过激励信号配置偏差电压源,无需更换硬件便可实现输出密钥的变化,且可在一个时钟周期内输出多位密钥。在SMIC 65 nm CMOS工艺下,采用全定制方式设计具有36个输出端口的PUF电路,版图面积为24.8μm×77.4μm。实验结果表明,该PUF电路具有良好的唯一性和随机性,且工作在不同温度（-40~125°C）和电压（1.08~1.32 V）下的可靠性均大于97.4%,可应用于信息安全领域。

英文摘要：

Physical Unclonable Functions（PUF） exploits process variation across the same structure circuits during the manufacturing processes to generate numerous unique, random and unclonable security keys. In this paper, a multi-port configurable PUF scheme is proposed, which is based on random deviation of current mirrors. It consists of input register, deviation-voltage source, multiplexing-net, arbiter array and obfuscation circuit. After configuring deviation-voltage source by applying different input challenges, the PUF circuit updates keys without physically replacement, and it can generate multi-bit keys in a clock cycle. In SMIC 65 nm CMOS technology, the layout of 36 ports configurable PUF occupies 24.8 μm×77.4 μm with custom designing. Experimental results show that the PUF circuit possesses better statistical characteristic of uniqueness and randomness, and it has a high reliability of 97.4% with respect to temperature variation from-40 °C to 125 °C, and supply voltage variation from 1.08 V to 1.32 V. It can be effectively used in information security field.