Crime-Fighting Metal Detectors Could Count Stacks of Cash—and Foil Smugglers [S
The use of magnetic inks in currency already allows vending machines to verify the authenticity of bank notes. But new research shows that metal detectors at security checkpoints could detect and count large stacks of notes from a distance for catching smugglers. More »
The use of magnetic inks in currency already allows vending machines to verify the authenticity of bank notes. But new research shows that metal detectors at security checkpoints could detect and count large stacks of notes from a distance for catching smugglers. More »