The Escapist Forums

To celebrate the 75th anniversary of the Australian Signals Directorate, the country's intelligence agency, the government issued a limited run of fifty thousand 50-cent coins with a series of encrypted codes embedded on them, each more difficult than the last and together forming a message to be uncovered. The agency put up a web form for anyone who completed the puzzle to submit their answers, with the hope of finding up-and-coming cryptography experts to recruit.

However, they didn't expect the code to be broken in an hour- which it was, by a 14-year-old boy living in Tasmania.