I am not yet very familiar with the topic of side channel attacks. So I have some general questions about it. I hope that you can help me.
If I have a known ciphertext and a known plaintext (fixed input and output), can I use the unknown key as a variable? That means I change after each calculation only the key byte and go through each key byte (subkey) from 00 to FF and measure the power consumption after every key byte change.
Is that possible? If I want to realize this with 3DES and AES (128 bit/16Byte Key), is the CHipWispherer Nano sufficient?