Describe two different possible sources of variation that could be used for PCB authentication. 1. Describe how variation in board capacitance could be leveraged for PCB signature generation and...

Describe two different possible sources of variation that could be used for PCB authentication.

1. Describe how variation in board capacitance could be leveraged for PCB signature generation and authentication.

2. Discuss the metrics that are commonly used for understanding the quality of signatures for PCB authentication.