http://techxplore.i2p/news/2021-04-scientists-harness-chaos-devices-hackers.html
We are exploiting that unreliable behavior to create a type of deterministic chaos," Gauthier said. The chaos amplifies the small manufacturing variations found on the chip. Even the smallest differences, when amplified by chaos, can change the entire class of possible outcomes—in this case, the secrets that are being produced, according to Charlot.