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Also, it might even make counterfeit coin production cheaper if it replaces rather than supplements current detection methods - maybe a counterfeiter can make a
by A1kmm 13y ago
Also, it might even make counterfeit coin production cheaper if it replaces rather than supplements current detection methods - maybe a counterfeiter can make a plastic or wooden coin of roughly the right shape and paint it with a paint containing the appropriate mixture, and then trick a vending machine into giving them non-counterfeit change.
- kabdib 13y agoUsual weight, magnetic and maybe inductance tests apply. I also wonder about someone's ability to take slices of the surface of a coin and spread that out over other cheaper coins. I guess you have to randomize the test, or make sure it covers more than just a couple predictable spots on the coin. Anti-piracy is hard.