Today, smart card technology is not just used in the shape of a card either. Sometimes it is inside something else, like a USB token, passport or cell phone. Smart cards have two different types of interfaces: contact and contactless.
- Contact smart cards are inserted into a smart card reader, making physical contact with the reader. Unlike a magnetic stripe card that is swiped, the contact smart card stays in the reader during use, so the computer in the card or token can communicate with the reader and the system or network behind it.
- Contactless smart cards have an antenna embedded inside the card that enables communication with the reader without physical contact. It works by holding the card or token near the reader. Both contact and contactless cards are capable of providing a very high level of security.