Hello,

In the “PA_CPA_2-Manual_CPA_Attack” code I don’t quite understand the following equation. Can anyone please help me understand what this equation implies?

Thanks!

Hello,

In the “PA_CPA_2-Manual_CPA_Attack” code I don’t quite understand the following equation. Can anyone please help me understand what this equation implies?

Thanks!

That’s the equation for calculating the correlation between the values we’re testing, in this case `sbox(pt ^ key_guess)`

, and a point on our power trace.

PA_CPA_2 is an old tutorial at this point. I’d recommend using `courses/sca101`

instead.

Alex