Applying EM analysis to capture critical information can be tricky, many factors can affect the quality of the signal. What measures should the attacker take to successfully perform the attack in a...

Applying EM analysis to capture critical information can be tricky, many factors can affect the quality of the signal. What measures should the attacker take to successfully perform the attack in a noisy environment, and what are the pros and cons of applying EM analysis over power analysis in this case?