I thought this was a fascinating read. To cut a long story short, he thought these cheap bank note detectors would be easy to fool.
But they measure several things at once, which are extremely hard to mimic in aggregate.
But they measure several things at once, which are extremely hard to mimic in aggregate.
Certainly, the tubular lock on most vending machines is vulnerable to a variety of attacks, so, if a criminal wants a snickers bar and maybe a lockbox of cash, buying a tubular lock pick is far more expedient than trying to counterfeit bills.
I am wondering if the author maybe didn't check whether 2 of 3 factors would be sufficient. It could be that the bill validators allow 1 of 3 factors to be out of spec to increase acceptance rate.
It's almost always far more expedient than doing whatever else...especially if you learn zipping or how to use a city rake effectively