2 ms·
tl;dr: special uv-altering particles in coating allows using a light to detect counterfeit; basic and high end scanners avail. for detection. reading between
by cat199 10y ago
tl;dr:
special uv-altering particles in coating allows using a light to detect
counterfeit; basic and high end scanners avail. for detection.
reading between lines:
sounds like the 'basic scanning' can be used e.g. for consumer/POS equipment to keep out the unsophisticated counterfeitters (e.g. coating is/is not present, perhaps some 'watermark' in the coating), and the 'sophisticated scanning' could potentially identify serial numbers/coin hash values in the light patterns or other means so that individual coins could be tracked, allowing discovery of more sophisticated attackers once these coins pass through banks or similar.
- huhtenberg 10y agoErm. If your assumption is correct, it's the _legit_ coins that could be tracked, not the counterfeit ones. Which, incidentally, makes this feature much more interesting.
- foota 10y agoCould be that it isn't a signature that is intentionally generated. It could just be based on how the light scatters, which is likely to be unique per coin. Like a fingerprint.