Research On PUF Circuit Design Based On Memristor Array

With the rapid development of IoT,data security is greatly challenged because of the intrusive nature of traditional hardware encryption algorithms.In order to ensure the randomness,unpredictability and safe and reliable "storage" of cryptographic sources,Physical Unclonable Function(PUF)as a new type of hardware encryption method has attracted more and more attention from researchers.As a new type of NVM device,the memristor has the characteristics of low power consumption,fast speed,high reliability,non-volatile,and multi-value storage.What is important is the intrinsic randomness of its high and low resistance states,which can be a good PUF provides an entropy source,and it has good reconfigurable characteristics for other forms of PUF design.This article provides a circuit design scheme based on the partial voltage physical unclonable function(PUF)of the memristor 1T1 R structure.The structure mainly includes a row,a column decoder,a transistor switch array,a logic control module,an(m-row)×(n-column)memristor array,m word lines,n bit lines,and a comparison amplifier circuit.It is optimized for the power consumption problem and stability index of the existing current-type physical unclonable function.D2 D and C2 C characteristics of the memristor are used as the realization of the reconfigurability of PUF.The physical unclonable function circuit designed in this paper only powers on the selected PUF unit in the working state,and the pin of the selected unit is left floating,so it has lower power consumption and will not be interfered by other units during operation.Will not produce sneak current phenomenon to improve stability and have a lower dislocation rate.The PUF of this design is closer to 0 and 50% in the Intra-chip Hamming distance and the inter-chip Hamming distance,which can well improve the practical benefits of the physical unclonable function.