I am a newbie. I got a chipwhisperer to learn about side-channel attacks. I have been going through a couple of tutorials. I am a bit confused with the power trace graph (For example, manual CPA attack tutorial). What is exactly we seeing in Y vs X-axis in the power trace plot? X-axis looks sample number. Is Y plotting current or voltage? If X is actually sample number how to convert that to time?
I am sorry if all this sounds trivial. But actually trying to understand it!