Nature magazine has an article on the first secure money transfer using entangled protons for quantum cryptography.
In last week’s trial, the entangled photons were created in a branch of the Bank of Austria in Vienna. One was sent to the city hall through a 1,450-metre-long fibreglass cable. The transfer took 90 seconds to complete; the money was then donated to Zeilinger’s lab.
That’s scary-cool.