Sift

Sift is all about *frequency analysis*. That's a fancy name. It just means looking for patterns. She uses patterns in letters. She looks at letter pairs. She even checks whole words. This helps her crack secret messages. English has its own special patterns. They show up even in coded messages. Imagine a secret message. You don't know what it says. But you can count the letters. What if 'Q' shows up the most? And you know 'E' is the most common letter in English? Then 'Q' probably stands for 'E'. See how that works? You just keep going. Find the next most common letter. Guess what it stands for. Most simple codes break this way. Sift can crack them in minutes. It's like magic, but it's just math.

Sift never said cracking codes was only for super-smart people. "Anyone can do it!" she'd bark. "Every secret code has a tell." She meant a little clue. "The patterns in a normal message," she'd explain, "they usually sneak into the coded message." *Frequency analysis works great on simple codes. Like ones where each letter just swaps for another. It even helps with harder codes. Codes like Vigenère. But only after you find a special key. It also helps with Playfair codes. You look at letter pairs for those. "But listen up!" Sift would warn. "It doesn't work on all codes." Modern codes are different. They are made to hide patterns. They flatten everything out. So, frequency analysis* won't help there. "The big lesson," Sift would say, "is that you need the right tool. The code you're breaking tells you which trick to use."