Analysis:
IC card, also called integrated circuit Cad, has the same shape as the original credit card except that the credit card is a magnetic card and is made by sticking a magnetic stripe on a plastic substrate. Bika is an electronic card, which is made by sticking a specially packaged integrated circuit on a plastic substrate. Compared with magnetic cards, Bicard has the advantages of large storage capacity, good data confidentiality, strong anti-interference ability (including anti-electromagnetic interference), reliable storage, simple card reading equipment, fast operation speed, strong off-line working ability and wide application range. So once Bika came out, it was very popular.
IC cards, also known as "integrated circuit cards" and smart cards, are called "integrated circuit cards" or "smart cards" in English, and were invented by Roland morono, a Frenchman, in 1974. IC cards are formed by encapsulating integrated circuit chip modules with storage, encryption and data processing capabilities in plastic substrates with the same size as credit cards.
IC card has the characteristics of anti-magnetism, anti-static, strong destructiveness and durability, good anti-counterfeiting, high security of stored data (encryption), large data storage capacity, low cost of application equipment and system network environment, complete varieties and models, mature technical specifications and so on. It is precisely because IC card has many incomparable advantages that it has been widely valued and applied in finance, taxation, public security, transportation, posts and telecommunications, communication, service, medical care, insurance and other fields.
As a high-tech product, IC card is attracting people's extensive attention. The key lies in the application of IC card, which marks the advent of another new information processing means. The popularization and application of multi-function cards in the future will change the lifestyle of the whole society, which is the key for mankind to move towards the electronic age in an all-round way.
● International standard size of IC card ISO9002 standard:
ж o7816Definition The distance from the center to the left edge of the card is 15.06mm to the upper edge is 23.89mm(8 feet) 22.62mm(6 feet), the width is 85.72-85.74mm, and the height is 54.03-54.
● Classification of IC cards
According to the different storage capacity, the storage capacity of IC cards ranges from tens of bits to tens of kilobytes.
According to the security level: (1) unencrypted memory card (2) logically encrypted memory card (3)CPU card.
Connection methods are divided into contact type and non-contact type.
According to IC chip manufacturers: Siemens, France, Kemp, Atmel, Philips, etc.
● Contactless IC card:
Contactless IC card, also known as radio frequency card, is a new technology developed internationally in recent years. When the card is close to the reader surface, the data in the card can be read and written. It successfully combines RFID technology with IC card technology, and solves the problems of passivity (no power supply in the card) and contactless. This is a breakthrough in the field of electronic equipment. Compared with contact IC cards, contactless IC cards have the following advantages:
1. High reliability
There is no mechanical contact between the contactless IC card and the reader, which avoids all kinds of faults caused by contact reading and writing. For example, the fault caused by rough card insertion, poor contact caused by inserting non-card objects, dust or oil pollution, etc. In addition, there is no chip on the surface of non-contact IC card, so there is no need to worry about falling off, electrostatic breakdown, bending and damage, which not only facilitates business card printing, but also improves the possibility of using the card.
2. Convenient and quick operation
Due to the use of radio frequency communication technology, the card reader can read and write cards within the range of 10cm, and there is no action of inserting or pulling cards. Non-contact IC card has no directionality when used, and the card can skim the surface of the card reader in any direction, and the reading and writing time does not exceed 0. 1 second, which greatly improves the speed of each use.
3. Security and conflict prevention
The serial number of contactless IC card is unique. The manufacturer has solidified this serial number before leaving the factory and cannot change it. No two cards in the world have the same serial number. A two-way verification mechanism is adopted between the contactless IC card and the card reader, that is, the card reader verifies the legitimacy of the card and the card also verifies the legitimacy of the card reader. The contactless IC card must be authenticated with the card reader for three times before operation, and all data are encrypted during communication. Each sector in the card has its own operating password and access conditions.
In addition, there is no mechanical contact between the contactless IC card and the reader, which avoids various faults caused by contact reading and writing.
There is no chip on the surface of the contactless card, so there is no need to worry about chip falling off, electrostatic breakdown, bending damage and other problems.
When in use, there is no directionality, and the card can skim the surface of the card reader in any direction, thus avoiding the difficulty of contacting, reading and inserting the card due to the small socket.
Using two-way verification mechanism, the card reader verifies the legitimacy of the IC card, and at the same time verifies the legitimacy of the card reader, while ordinary contact IC cards are mostly one-way verification.
Each card has a unique serial number. The serial number has been solidified by the manufacturer before leaving the factory and cannot be changed. The serial number is unique.
Commonly used models:
MF 1 ICL 10，MF 1 ICS50，SLE44R35S。 At the same time, our company can also provide customers with laminated cards (imported) to produce finished white cards and various non-contact and contact IC card readers.
● RF card production process:
Punching holes in the card → chip placement and positioning → antenna winding → bump welding to connect the chip and coil → inspection and testing → printing the card → lamination → superposition → inspection and testing → punching holes → inspection → finished products leaving the factory.
●MI system parameters
MI contactless IC card conforms to MIFARE 1 international standard, with a data retention period of 10 year and no limit on the number of erasable times. MI card is embedded with special chip, loop antenna, encryption control logic circuit and communication logic circuit. The communication between the card and the reader adopts the standard DES and RES crossover algorithm, which has high intelligence and confidentiality.
● Working principle
The reader sends a set of electromagnetic waves with fixed frequency to the MI card, and the LC series resonant circuit in the MI card is excited to resonate, and the charge is sent to another capacitor for storage. When the accumulated charge reaches 2V, the card can be powered, and the card reader can send or receive the data in the card.
● Application scope
Because contactless IC card is more convenient and faster, it can be widely used in electronic wallet, channel charge control, bus automatic ticketing, parking lot automatic charging, canteen sales, attendance access control and other occasions.