Side channel attacks
 

For anybody interested in embedded systems side channel attacks, here is the link from the company which developed the chipwhisperer

https://www.newae.com/chipwhisperer

The ChipWhisperer® ecosystem presents the first open-source, low-cost solution to expose weaknesses that exist in embedded systems all around us.

As a followup, If you can't afford to spend ~600 US$ on a ChipWhisperer-Husky
Then the Picoglitcher might be an alternative, because it only costs ~55 US$, and is based on similar hardware as the Husky and shows promising results.

https://www.tindie.com/products/faulty-hardware/picoglitcher-v21/
https://www.youtube.com/watch?v=3To4tyzmRsg