Transistors repurposed as microchip 'clock' address supply chain weakness

https://phys.org/news/2023-01-transistors-repurposed-microchip-clock-chain.html

"set of FinFETs (all high-performance electronics use FinFETs) producing frequency of 8-12 GHz, which exceeds typical native clock rates of microprocessors, repurposing data processing transistors into timing device... used to be made separately and often offsite, and later bundled... now, making the whole clock inside processor hardens device against clock-glitching attacks... also enables acoustic fingerprinting of packaged chip for tamper detection"