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What are sources of leaking timing information?

What are the two basic requirements to avoid the leakage of timing information?

Which transformations are performed within the final round of AES?

What is the difference between a simple power analysis (SPA) and a differential power analysis (DPA) attack?

How does the DPA on AES work?

Why is it important that the power traces are aligned?

Name and explain three countermeasures against power analysis attacks.