Hello, i’m quite new in this area and i dont find the file of the AES algorithm, I have a CWLite and a CW303 target. I want to modify the algorithm for see how some countermeasure work. (Im using the V4).
Also i have another question, in all the papers that i read and the introduction video to SCA by Colin O’Flynn they always attack after the subbytes function. My question is, why exactly this point? Why not after the first addroundkey?
If anyone can guide me on these two topincs, it will be great!
Thank you very much in advance.