What principle is the property access card based on?

Because there is a chip called RFID in it, when we take a card with RFID chip and pass the card reader, the electromagnetic wave emitted by the card reader will start to read the information in the card, which can not only be read, but also written and modified, so the chip card is not only a key, but also an electronic identity.

Because as long as you write your personal information on the chip, you can know who is coming in and out from the card reader.

According to the inside of the property access card, it is composed of coils and chips, and it is based on radio frequency technology (RFID). When the card of RFID chip passes by the card reader, the electromagnetic wave emitted by the card reader will start to read the information in the card, which can not only be read, but also written and modified, so the chip card is not only a key, but also an electronic identity.

Only when the cardholder quickly swings the card near the card reader (5- 15cm) can the card reader sense that there is a card and guide the information (card number) in the card to the host computer, which will first review the illegality of the card before deciding whether to close the door.

Extended data:

First of all, the recipient

Access cards are uniformly produced and managed by the office and distributed to employees and households who need work and life. When employees receive access cards in the office, they should go through relevant confirmation procedures.

Second, reissue it.

If the card is damaged or lost due to improper use, the relevant formalities shall be completed and the damaged card shall be recovered by the office.

Step 3 cancel

1, access card belongs to intelligent IC card, which stores the relevant information of residential buildings. If you lose it, please go to the office to cancel it.

2. All the consequences caused by the failure to handle the cancellation procedures in time due to the loss of the access card shall be borne by the recipient.

3. When the recipient no longer uses it due to reasons such as resignation, the Shanghai Stock Exchange needs to get an access card, and the office needs to check the number and go through relevant resignation procedures.

Baidu encyclopedia-access card