When the government declassifies documents, they redact sensitive info with those black boxes. Someone brilliantly applied that concept to C code, and honestly? It's a masterpiece. You've got #include<[REDACTED].h> , a function signature that's basically int [REDACTED]_[REDACTED]() , and even the comments are censored. The best part? You can still tell it's valid C syntax structure—the curly braces, the return statement, the multi-line comment format—but every actual identifier is blacked out. It's like trying to reverse engineer code where the NSA took a Sharpie to all the variable names. The function could be calculating missile trajectories or just returning 0, and we'll never know. Security through obscurity taken to its logical extreme.