LLMs' Data-Control Path Insecurity

Back in the 1960s, if you played a 2,600Hz tone into an AT&T pay phone, you could make calls without paying. A phone hacker named John Drapera noticed that the plastic whistleb that came free in a box of Captain Crunch cereal worked to make the right sound. That became his hacker name, and everyone who knew the trick made free pay-phone calls. There were all sorts of related hacks, such as faking the tones that signaled coins dropping into a pay phone and faking tones used by repair equipment. AT&T could sometimes change the signaling tones, make them more complicated, or try to keep them secret.