Contact IC card and non-contact type IC card difference

    Bus IC card (Integrated Circuit Card, IC card) non-contact type. As long as the IC card within a certain distance from the reader, readers can read the card data on IC card chip without the need to have physical contact with the reader.
    Introduction of non-contact IC card is also called radio frequency card, successfully resolved the passive (no power supply card), and free access to this dilemma is the field of electronic devices a major breakthrough. Is mainly used for public transport, ferry, subway automatic toll system, also used in access control, identity and e-purse.
    ic card Principle: ic cards on the basic principle is: RF reader IC card issued to a group of fixed-frequency electromagnetic waves, there are an IC card series co-oscillator, its frequency and the frequency of launching the same reader, so that electromagnetic wave excitation, LC co-oscillator resonance, so that capacitor with the charge; in this charge the other side then there is a single wizard-pass the electronic pump, the capacitor charge storage capacitor to another, when the the accumulation of charge to 2V, this capacitor can be used as power for other circuits to provide operating voltage, data transmission will be the card reader to go out or receive data.
    The information is stored on the IC card, I have not seen a very clear statement, but I think the relevant information is stored in the IC card inside. I think that the current IC card reader is not connected with the data center, real-time, otherwise, the wireless network project is too big, therefore, information must be stored in the card.
    Non-contact type IC card is also called radio frequency card, from the IC chip, sensing antenna, packaged in a standard PVC card, the chip and the antenna without any exposed parts. Is the world in recent years developed a new technology, it will be a successful radio frequency identification technology and IC card technology together, ending a passive (no power supply card), and free access to this dilemma is the field of electronic devices a major breakthrough. cards in a certain distance range (typically 5-10mm) close to the reader the surface, through the transmission of radio waves to complete the data read and write operations.

1. Non-contact IC card and reader through radio waves between the read and write operation to complete.
    Frequency of communication between the two 13.56MHZ. Non-contact IC card itself is passive cards, when the reader to the card read and write operations are read and write the signal emitted from the stack composed of two parts: one is the power signal, the signal received by the card later, with my own L / C produces a transient energy to supply chips work. Another part is the instruction and data signals, directing the completion of the data chip to read, modify, store, etc., and returns the signal to the reader, to complete a read or write operation. Readers are generally microcontroller, dedicated smart module and antenna, and is equipped with the communication with the PC interface, printer port, I / O port, in order to be applied to different areas.
 
2. Non-contact smart cards within the district
    Non-contact smart card inside is divided into two parts: the System area (CDF) User Area (ADF)
    System area: from the card manufacturers and system developers and card-issuing institutions.
    User area: used to store the cardholder data.

3. With contact-type IC card compared to non-contact-type card has the following advantages:
    ⑴ high reliability non-contact type IC card and no mechanical contact between the reader and avoid contact with reading and writing due to a variety of faults arising. For example: As brutal card, non-card insert foreign objects, dust, or oil led to failures caused by poor contact. In addition, non-contact type card surface without bare chip, need not worry about off-chip, electrostatic breakdown, bending damage and other issues, both for card printing, but also improves the reliability of the use of the card.
    ⑵ easy to operate
    As the non-contact communication, reader in the 10CM cards can be within the scope of operations, they do not have pluggable card, very convenient to use. Non-contact type card without direction, card reader can be swept in any direction the surface, can complete the operation, which greatly improves the speed of each use.
    ⑶ anti-collision
    Non-contact card in a fast anti-collision mechanism, to prevent interference of data between cards, so readers can "simultaneously" Dealing with more than one non-contact IC card. This has increased the application of parallelism, imperceptibly improve the system work faster.
    ⑷ can be suitable for a variety of applications
    Non-contact card's serial number is unique, manufacturers of products manufactured prior to curing this serial number can not be changed. Non-contact between the card and reader using two-way authentication mechanism, namely, IC card reader verify the legitimacy of the same time, IC card reader also verified the legitimacy of.
    Non-contact type card reader before it is processed with mutual authentication between the three, but also in the process of communication in all of the data are encrypted. In addition, the card operation in various sectors have their own password and access conditions.
    Contact structural characteristics of the memory card to make it a multi-purpose card can be used in different systems, users can set different according to different application passwords and access conditions.
    ⑸ Encryption good performance
    Non-contact IC card by the IC chip, sensing antenna, and fully sealed in a standard PVC card, no exposed parts. Non-contact type IC card reading and writing process, typically by a non-contact type IC card and reader via radio waves between the read and write operation to complete.
    Composition: one is the power signal, the signal received by the card after his own L / C generated resonance, producing an instant energy to supply chips work. The other part is a combination of data signals, directing the completion of the data chips, modification, storage, etc., and returned to the reader. By a non-contact IC card reading and writing formed by the system, whether hardware structure, or operation have been greatly simplified, while the help of advanced management software, offline mode of operation, all the data read and write process easier.