Fig. 1: FeFET-based strong PUF overview. | Nature Communications

Fig. 1: FeFET-based strong PUF overview.

From: Demonstration of high-reconfigurability and low-power strong physical unclonable function empowered by FeFET cycle-to-cycle variation and charge-domain computing

Fig. 1

a Conceptual workflow for PUF-based IoT device authentication. After manufacturing, each PUF chip registers unique CRPs, which are pre-stored on trusted cloud servers. The stored CRPs are compared with the ones generated at the edge for authentication. Besides, reconfigurability is essential for updating CRPs to enhance security. b To meet the low-power requirements of IoT devices, nonvolatile FeFETs are integrated with capacitors to reduce static power with energy-efficient operations. c Unlike conventional designs, where the D2D variation may override the C2C variation and degrade reconfigurability, the FeFET C2C variation is exploited throughout both registration and reconfiguration to ensure high reconfigurability. d The proposed 2FeFET-1C PUF cell achieves low-power and accurate charge-domain computations to provide a massive CRP space for numerous IoT devices.

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