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IC card & ID card
Dec 21, 2017

In accordance with the form of data transfer with the outside world, IC card contact and non-contact two.

① Contact IC chip chip metal contacts exposed, the naked eye can be seen through the contacts on the chip can read and write external contact with the exchange of information, the current use of the IC card belongs to this.

② non-contact IC card (RF card) chip all enclosed in the card base, no exposure to the part, through the radio waves or electromagnetic induction to exchange information, usually used for access control, bus charges, subway fees need to "flash "The occasion.

[MF1 card] Full name mifare one card, that is, non-contact RF IC card. Since the MIFARE ONE PHILIPS IC S50 made by Philips of the Netherlands has become a similar industry standard, the MF1 PHILIPS IC S50 card is often referred to as MF1 original card while the MF1 S50 compatible card is called MF1 Compatible cards, such as those produced using the F11RF08 chip from Shanghai Fudan University, as well as other cards compatible with Shanghai Hua Hong Company, Shanghai Belling Company, Hangzhou Silan Microelectronics Co., Ltd., Siemens AG of Germany (now renamed as Infineon), ISSI Corporation of the United States S50 chip production card.


IC card can be divided into memory card, logic encryption card and CPU card (smart card) according to different integrated circuits in the card.

① memory card: the IC card is electrically erasable programmable read-only memory EEPROM, it has only data storage capabilities, no data processing capabilities; memory card itself without hardware encryption, only the file encryption, more Easy to be cracked. Memory cards are less expensive and suitable for dumped media that uses only IC cards as data or systems that have software encryption without fear of being tampered with.

② logic encryption card: IC card includes encryption logic and programmable read-only memory EEPROM, encryption logic circuit to a certain extent, to protect the data card and card security, but only low-level protection, can not prevent malicious attacks. Logic encryption card by setting the password area on the card to control the card read and write, affordable, the largest number of applications

③ Smart Card (CPU Card): The integrated circuit in the card includes CPU (Central Processing Unit), Programmable ROM (Read Only Memory), RAM (Random Access Memory) and COS (Chip Operating System) which is embedded in the ROM. Card data is divided into external read and internal processing part to ensure that the card data is safe and reliable. The integrated circuit of the CPU card is equipped with a microprocessor, so that data processing and information processing can be performed by itself. At the same time, mutual authentication between a card and a device can be performed by using a random number and a key, and the security is high.


IC card with magnetic card and bar code card unmatched many advantages: large storage capacity, is several times the magnetic card to several times; high security, with anti-counterfeit, tamper-resistant capabilities; can be used offline, the application is more flexible. At the same time, there are also disadvantages such as high price, weak antistatic and UV ability.

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ID card chip card - read-only non-contact IC card (used to call EM card, RF card ordinary)

【ID Card】 full name card (Identification card), used to be called "EM card." The ID card is a THRC12 / 13 read-only contactless IC card. It is powered by a card reader and reads out the unique card number stored in the chip EEPROM. The card number is written before the card seal, and can not be changed after the card seal. Passive and contact-free is the chip's two most prominent features

It receives radio frequency energy from the reader, generates power and clock for the chip, and adopts the technology of phase shift keying and loading amplitude modulation to realize the wireless communication between the card and the card reader.

ID card is a normal RF card. The simplest and most common RF card is the low frequency 125KHz ID card (with thick card, thin card points). ID card because a large number of the Swiss EM4100 / 4102 chip, it is also used to be called "EM card." The ID card has a read-only function that contains the only 64b anti-rewrite password, which card number has been cured at the factory and guaranteed to be unique worldwide and never to be changed. Its low cost, more used in Shoufan, attendance and so on.


⑴ ID card main features

Carrier frequency of 125KHZ (THRC12) or 13.56MHZ (THRC13);

Card to the reader to send data modulation for loading amplitude modulation;

Card data coding using anti-interference ability BPSK phase shift keying;

Card to reader data transfer rate of 3.9kbps (THRC12) or 6.62kbps (THRC13);

Data storage using EEPROM, data retention time of more than 10 years;

A total of 64 data storage capacity, including manufacturers, distributors and user code;

Card number written in front of the seal card can not be changed after the absolute guarantee card number uniqueness and security;

THRC13 chip package in addition to the standard card shape, but also can be packaged into chips and other applications according to the needs of a variety of shapes.


⑵ ID card working principle

The system consists of card, card reader and background controller. The working process is as follows:

Card reader will carrier signal sent out by the antenna;

After the card enters the working area of the card reader, the resonant circuit formed by the inductance coil and the capacitor in the card receives the carrier signal transmitted by the card reader. The RF interface module of the card chip generates the power voltage, the reset signal and the system clock , The chip "activated";

The chip read control module modulates the data in the memory by the phase modulation code and modulates it on the carrier, and sends the data back to the card reader via the card antenna.

Card reader to receive the card back to the signal demodulation, decoding, sent to the background computer;

Background computer according to the legitimacy of the card, for different applications to make the appropriate treatment and control.

 

⑶ ID card applications

Compared with the contactless IC card, contactless ID card without plug-in card, to avoid due to mechanical failure caused by a variety of failures, which has the convenience of operation, fast, reliable, long life and other prominent advantages, especially for the flow of people Big occasion

Although it is only a kind of read-only card, but the use of background computer control management, even involving fees management issues can also be applied in a certain range, such as canteen dining charge management. For specific applications, the cardholder's personal information can be sent to the background computer, the establishment of the database and configure the application software, the card reader will be used to read the card number sent to the back-end computer, call the cardholder's personal from the database Data, and then should be based on the specific operation,


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