What is the encryption principle of IC card in access control system?

The card reader is used to read the smart card information (card number) of the card reader, and then convert it into an electrical signal and send it to the entrance guard controller. According to the received card number, the controller judges whether the cardholder is authorized to enter the gate within this time period through software, and completes the work of unlocking and keeping the lock according to the judgment result.

For the networked access control system, the controller also receives the personnel information and corresponding authorization information sent by the management computer, and at the same time transmits the credit card record of entering and leaving the door to the computer.

Extended data:

Card type

1, magnetic card

Advantages: low cost; One card per person (+password), generally safe, can be connected to a microcomputer, and has a record of opening the door.

Disadvantages: worn equipment and short service life; Cards are easy to copy; Both directions are difficult to control. Card information is easily lost due to external magnetic field, which makes the card invalid.

2. Radio frequency card

Advantages: the equipment has no contact, and the door is convenient and safe; Long service life and theoretical data of at least ten years; High security, can be connected to a microcomputer, and has a door opening record; Bidirectional control can be realized. Cards are difficult to copy.

Disadvantages: high cost.

Baidu Encyclopedia-Principle of Access Control System