Science News

Quantum counterfeiters might succeed

QUANTUM CASH Physicists have created quantum money by encoding data with light. The researchers transmitted a quantum version (right) of a real bill, an old Austrian banknote (left). Each grayscale shade in the quantum bill corresponds to a different photon polarization.

From Science News»

by Emily Conover

Scientists have created an ultra-secure form of money using quantum mechanics — and immediately demonstrated a potential security loophole.