How could a star-coil trace structure in PCB be used for designing physical unclonable functions? Can you come up with a similar novel structure to extract more variation from PCB? Describe your...

How could a star-coil trace structure in PCB be used for designing physical unclonable functions? Can you come up with a similar novel structure to extract more variation from PCB? Describe your mechanism in detail.

1. When a PCB is deployed in a harsh environmental condition (for instance, extreme heat), the generated signature from the PCB could vary from its golden reference. What would be your mechanism to tolerate these errors?