ECE doctoral students Matthew Donnelly, Wen Liang, and Meiyue Zhang, with Distinguished Professor Lixin Gao and Associate Professor Guangyu Xu, reported a reconfigurable silicon photodiode that works as a physical unclonable function for IoT security. Published in IEEE Electron Device Letters, the all-silicon device generates unique cryptographic labels that resist machine-learning attacks and can mask user images on resource-limited edge devices. ECE announcement