Smart cards are embedded microprocessors that can handle complex tasks and share information almost instantly. But, how exactly do they work?
A smart card is a computer chip so tiny it fits inside of a plastic credit card. It’s a pocket sized cord with embedded integrated circuits. These smart cards are used in everything from financial transactions–like credit cards–to mobile phones. In Europe, smart cards are used much more, particularly in mobile phones.
The cards are usually made from plastic. The size of a smart card is usually the same as a credit card, or close to the size of a credit card. The microprocessor part of the card is found under a gold foiling that rests on the outside of the card.
Smart cards are tamper resistant. These smart cards can share information with a card reader like that found in an ATM or credit card machine. But, the cards aren’t usually swiped. They’re either tapped on the reader so that the information is read simply from being in close proximity or the cards or put in the reader and read by contact with the card.
The technology behind smart cards has actually been around since the 1960s but the chips were much larger. In the 1980s, a German scientist created a card for using to pay for a call on a pay phone. The cards weren’t widely used and received. The technology wasn’t really used much until the 1990s when cell phones in Europe developed using the smart card technology with a card called a SIM card. With the popularity of the cell phone in Europe on the rise, the smart cards too became much more popular.
In fact, every German citizen has a smart card. The German health care card is a smart card that tracks health care coverage for Germans.









