ID key holder
As the read-only non-contact IC card, power supply by the reader and read out the chip stored in the EEPROM in a unique card number, the card number written in the card before, after sealing card can not be changed. Passive and contactless are two of the most prominent features of the chip, RF interface circuit is the key to the core technology, it receives RF energy from the reader, the chip power and clock, and phase shift keying and load amplitude modulation Technology to achieve wireless communication between the card and the reader. Non-contact ID card with easy operation, fast, reliable and other outstanding advantages, access to a wide range of applications.
ID card full name for the identification card (Identification Card), is a non-writeable proximity card, with a fixed number, mainly Taiwan SYRIS EM format, the United States HIDMOTOROLA and other types of ID cards. ID card and magnetic card, just use the "card number" only, the card in addition to the card number, without any security features, the "card number" is open, bare. So ID card is "induction magnetic card." ISO standard ID card specifications: 85.5x54x0.80 ± 0.04mm (H / W / thick), the market there are some thick, thin card or shaped card.
ID card in the weak system is generally used as access control or parking system user identification, because it does not have built-in power supply, when used without contact and long life, so weak in the system has a wide range of applications. The emergence of ID card basically eliminated the early magnetic or contact IC card. But because the ID card can not write user data, the record content only card number can only be written one-time by the chip factory, developers can only read out the card number to be used, can not be based on the actual needs of the system to develop a new number management system. At the same time because the ID card has no content, so the card holder's authority, the system function operation to completely rely on the computer network platform database support.
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