counterfeit money

An ancient Chinese banknote is just a piece of paper, so why didn't anyone counterfeit it, how did the ancient government prevent counterfeiting?

With the old currency, you cannot copy because the banknote has EURion constellation system, it is small spots that appear on almost all types of money.

Although it was born in the early 19th century, but you really know

Although they know that it is illegal, these characters still defy all, creating many big money-making missions in the world.

Strange optical effects on butterfly wings can help people encrypt information on banknotes or other precious objects to prevent counterfeiting.

Scientists have invented these

$ 100 bills are popular in the international market. The US Federal Reserve estimates that up to one-third to two-thirds of the $ 100 spent in countries outside the United States.

US researchers have found a way to embed radio frequency identification (RFID) tags into paper, promising a broad array of applications in everyday life.