Cybersecurity handbook by One Beyond
Cap'n Crunch whistle
Image from Wikipedia: John_Draper
(...) Only one cereal box toy has that distinction: the Cap’n Crunch Bo’sun whistle. Meant to replicate the whistles used by sailing officials (boatswains) to signal mealtimes or commands, the multicolored whistles came along with boxes of Cap’n Crunch starting in the mid-1960s. One fell into the hands of John Draper, a former U.S. Air Force electronics technician. Draper was part of an underground culture that predated hacking as we know it: phone phreaks. These early hackers played certain tones through their telephones to bypass AT&T’s analog system and get free long-distance phone calls. By Atlas Bbscura
Full Changelog: https://github.com/guidesmiths/cybersecurity-handbook/compare/v0.0.26...v1.0.0