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 networked access control systems,

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 access record to the computer. A controller can form a simple access control system to manage one or two doors.

A plurality of controllers are connected with computers through communication networks to form the access control system of the whole building. The computer is equipped with the management software of the access control system, which analyzes and processes all the information in the management system.

Extended data

Components of access control system

1, access controller

The core part of the access control system is equivalent to the CPU of the computer, which is responsible for the processing, storage and control of the input and output information of the whole system.

2. Card reader (reader)

A device that reads data (biometric information) from a card.

3. Electric lock

The executive part of locking the door in the access control system. Users should choose different locks according to the door material and the requirements of going out. There are mainly the following types:

(1) electromagnetic lock: the electromagnetic lock is opened after power failure, which meets the fire protection requirements. And equipped with a variety of mounting brackets for customers to use. This lock is suitable for one-way wooden doors, glass doors, fire doors and split electric doors.

(2) Anode lock: The anode lock is power-off and door-opening, which meets the fire protection requirements. It is installed on the upper part of the door frame. Different from electromagnetic locks, anode locks are suitable for bidirectional wooden doors, glass doors and fire doors, and have their own door magnetic detectors, which can detect the safety status of doors at any time.

(3) Cathode lock: Generally, the cathode lock is energized to open the door. Suitable for one-way wooden doors. The installation of cathode lock must be equipped with UPS power supply. Because the mother lock locks the door when the power is off.

4. cards

The key to the door. You can print the cardholder's personal photo on the card, and the door opening card and the badge are combined into one.

5. Other equipment

Baidu Encyclopedia-Principle of Access Control System