The first picture to come is the correlation vs bit plot, even though the tutorial suggests us to use Y’s curve(in my case, the attack result failed in many bits with different thresholds), I chose X’s and find a one-bit failed attack result, which is more satisfying.
Then, I chose thresholds as follows,
The attack is just a bit far from a success,
I changed different thresholds for many times; however, it always failed in the bit 255, and this confused me a lot. Why can it always fail in the same bit?