Contactless IC FM4442 card; 4428 card; SLE5542 card; 5528 card
1. IC card, also known as 'integrated circuit cards', its IC standard serial EEPROM. Smart card, the English name 'Integrated Circuit Card' or 'Smart card', the French Roland Moreno invented in 1974, it will have a storage , encryption and data processing integrated circuit chip and magnetic encapsulated in the same size as the size of the plastic film base, constitute the IC card.
2. IC card points encrypted memory card and memory card encryption
Non-encrypted memory card: IC card standard serial EEPROM.
Encrypted storage card: IC card serial EEPROM with the encryption logic.
EEPROM: is an available electrical method will erase its contents all at once, in accordance with byte-erase and then re-write of the storage circuit.
Comparison 3. IC cards and other cards
Since the IC card using the most advanced semiconductor manufacturing technology and information security technology, IC card relative to other types of card has the following characteristics:
⑴ storage capacity: its internal RAM, ROM, EEPROM, and other memories, the storage capacity can be megabytes, can store text, sound, graphics, images, and other information.
⑵ small size, light weight, strong anti-jamming ability, easy to carry and easy to use.
⑶ safe: IC card implementation from the hardware and software aspects of its security policy, you can control access to the characteristics of different regions within the IC card encryption card itself has a secure password, if an illegal attempt to access the data on the card. self-destruction, can no longer be read.
⑷ less demanding on the network: security IC card so that reduce the reliability of the computer network in real time, sensitivity requirement in the application environment is very consistent with the current situation is conducive to the use of low quality in the network environment.
Depending on the manufacturers of chips and the same different chip manufacturers, IC card has its own specific characteristics (see related items), but in terms of its characteristics, the following points now to compare with the card.
1. Storage capacity:
Maximum card can only store a few hundred bytes, magnetic stripe can do as a passive storage intermediary. The IC card can store 1M byte, and storage area can be divided, there are different levels of access.
2. Encryption of
Magnetic no control circuit, so the internal data read and write can not safely control, order and read technology is mechanical, and control circuit IC card can read and write to its internal data, erasing control technology is random read .
3. Network of dependency:
When you use the card to ensure that a strong real-time between the terminal and the host, once the host or network failure will cause the entire system to a standstill, while the IC card can store large amounts of data, but also by the logic control, the use of all the operations of all by the terminal independently, completely out of the terminal dependent on the network.
Magnetic shorter life, usually between the months of their life to a year, while IC card is not man-made damage life of up to ten years.
Card in anti-magnetic, anti-static, waterproof, etc. are poor, and the magnetic stripe can not mess wipe, and IC cards are strong in these areas, but the chip should be kept clean.
6. The security of:
Card is easy to forge, and IC card itself has a strong logic encryption, making counterfeiting rate is almost zero.
7. IC card reader equipment is simple and reliable than magnetic card reader equipment, are cheap, easy to promote, easy to maintain.
Three .IC card storage structure:
Different IC card chip that stores different structure, now simply describes the general situation:
IC card with a considerable storage area, in this region can be divided into a unit, each unit that is a stored data is placed in each cell, a cell can be arbitrarily specify a data store, and may be a random store. Some IC card is divided into different zones, each zone has its unique nature, but on each of its regional storage were similar way.
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