IC card? (Integrated Circuit Card, IC card), also known as smart cards (Smart card), smart cards (Intelligent card), a microcircuit card (Microcircuit card) or microchip cards. It is a micro chip embedded in the card base in line with ISO 7816 standards in the form of a card made. Communication between IC card and reader can be a contact or non-contact. The communication interface to the IC card into a contactless IC card, contactless and dual interface IC card (along with contact and non-contact communication interface). IC card information because of its inherent security, portable, quite perfect the advantages of standardization in the field of authentication, banking, telecommunications, public transport, parking lots and management is being more and more applications, such as second-generation ID cards, bank The electronic wallet, Telecom's mobile phone SIM cards, public transport bus card, subway card, collect parking fees for parking cards, etc., all play an important role in people's daily lives. IC card information carrier is yet another card after appearing. IC card is an IC card, usually with a bus card is an IC card and general common IC card using radio frequency technology and support IC card reader communication. IC card and magnetic card is different, IC card information stored by the integrated circuit card, and card information is recorded by the magnetic card. Cost IC card is generally higher than the card, but better confidentiality. Non-contact IC card, also known as radio frequency card, successfully resolved a passive (no power supply card) and avoid contact with this problem, it is a major breakthrough in the field of electronic devices. Mainly used for transportation, telecommunications, banking, yard management. The main features include secure authentication, electronic wallets, data storage. Common access cards, second-generation ID card belonging to security certification applications, and bank card, subway card is the use of an electronic wallet function. The basic principle of IC cards work are: RFID reader send a fixed frequency electromagnetic waves to the IC card, there is a series resonant LC circuit in the card, with the same frequency as the frequency emitted by the reader, so that the electromagnetic excitation, LC resonant circuit resonance, so that the charge in the capacitor with; at the other end of this capacitor is connected with a single conduction electron pump, and the capacitive charge to another within the capacitive storage, when the accumulated charge reaches 2V when This capacitor can be used as power supply operating voltage for the other circuits, will launch the card data reader out or receiving data. Products by the structure embedded memory khaki equivalent to an ordinary serial EEPROM memory chip, such convenience store card information, easy to use, inexpensive, can replace the card on many occasions, but because of its own does not have the information security function, therefore, only Privacy can be used for less demanding applications. Logic encryption card encryption chip embedded memory card to increase storage area outside the control logic, before accessing the storage area need to check a password, only the password is correct, in order to access operation, the confidentiality of such information is better, using a common memory card It is similar. CPU card CPU card embedded chip is equivalent to a particular type of microcontroller, in addition to substandard interior with a controller, a memory, timing control logic, but also with arithmetic unit and operating system. Because CPU card has a large storage capacity, strong processing power, information storage security and other features. Widely used in information security requirements are particularly high occasions. Super smart card in the card MPU and memory and is equipped with a keyboard, LCD monitor and the power, and some on the card also has a fingerprint recognition devices. Press contact IC card interface points such card by contacting the contact after contact with the IC card of IC card reader devices read and write data. ISO7816 international standard for mechanical properties, electrical properties and other such cards were strict rules. Non-contact IC card and IC card card class equipment without electrical contacts, but to read and write (such as optical or wireless technology) through non-contact reading and writing. In addition to its embedded chip CPU, logic unit, a storage unit, increasing the RF transceiver circuit. International standard ISO10536 series elaborated on the non-contact IC card requirements. Such cards generally used in frequent use, a relatively small amount of information, high reliability requirements of the occasion.