We’ve discussed before what a problem counterfeiting is in the coin world. In recent years counterfeit coins have proliferated in America so frequently, many of them imported from China via online sales, that the U.S. Mint has issued warnings. A few years ago, when the stock market was in freefall and real estate rapid lost value, collecting coins became not just a hobby but an investment for many people. The characteristics about coins that make them valuable - origin, condition, scarcity, and history - do not fluctuate much over time and, unlike bank accounts, coins are not hackable (although they can, of course, be stolen). Counterfeiting is a significant threat to collectors, however, and anyone involved with coins has an incentive to stop it.
In April the European Central Bank issued new €50 banknotes they designed to be far less vulnerable to counterfeiting. These orange-yellow bills were designed in consultation with Stanford neuroscientist David Eagleman to so that anyone - not just currency experts - would be able to spot a fake. The usual security measures are present, including watermarks, color-changing inks, threads, and microprinting, but instead of relying on high tech measures, the ECB took a new tack: focusing on face recognition. This is because the general populace doesn’t look at their money very carefully and the human brain isn’t designed to spot inconsistencies in objects that often decorate paper money.