Smart Cards and tokens (contact or contactless): They contain a computer circuit using an ICC
(Integrated Circuit Chip).Contact Cards - Inserted into a machine to be read. This can be credit
cards you insert into the chip reader or the DOD CAC (Common Access Card). Contactless Cards - can
be read by proximity. Key fobs or credit cards where you just hold it close to a reader. They use a
RFID (Radio Frequency Identification) tag (transponder) which is then read by a RFID Transceiver.