A 14-year-old Tasmanian boy cracks four levels of code imprinted on a commemorative 50-cent coin in "just over an hour" after it was released by the nation's foreign intelligence cybersecurity ...

The Royal Australian Mint has dropped a brand new version of the $1 coin, and there's a hidden message for people to crack. The rare new coin commemorates the centenary of the Royal Australian Corps ...

The Mint has released a $1 coin for the centenary of the Royal Australian Corps of Signals, complete with a secret encoded message.