When you look at a screen full of scrambled data, it probably looks like static on an old TV. To most of us, it’s just garbage. But to a small group of math detectives, that static is full of clues. They use a technique called differential cryptanalysis to find tiny, almost invisible biases in that data. If a digital lock is working perfectly, the output should be as random as a coin toss. But if there’s even a one-in-a-billion lean toward one side, these detectives can use that to pull the whole thing apart.
Think of it like a deck of cards. If you shuffle them perfectly, you have no idea what the next card will be. But if the person shuffling has a
