Access Control System Introduces Bluetooth Technology

With the continuous development of science and technology and the improvement of people's safety awareness, the use of access control systems in modern offices and people's daily lives is becoming more and more widespread. Bluetooth technology has also been successfully applied to access control systems.

Bluetooth (Bluetooth) is a kind of low-power, short-range wireless communication technology standard. Its essence is to establish a common wireless air interface and its open standards for control software, so that communications and computers can be further integrated, so that different manufacturers can produce Portable devices can have interoperable and interoperable performance at close range without wires or cables connected to each other. In general, its connection range is between 10 cm and 10 m; if the transmission power is increased, the connection range can be extended to 100 m.

The transmission distance of devices using Bluetooth technology is not very long. In order to solve such problems, it is often equipped with certain relay devices during actual use. In this case, the entire connection can effectively achieve interoperability and improve the reliability of the system. In addition, the use of repeaters can provide a good opportunity for future product upgrades. By adopting Bluetooth technology, the installation cost of products will be significantly reduced, mainly in terms of labor costs and resource costs. The reduction in costs can also in turn promote the sales of products, which in turn will reduce other related costs.

In the access control industry, the vast majority of systems use RS-232 and RS-485 hardware interface standards to connect various readers and monitoring devices to each other. If the facilities that need to be monitored are not equipped with the necessary lines in advance, we have to create holes in the buildings so that suitable monitoring equipment can be installed. Now that we have Bluetooth technology, we can avoid this phenomenon. Not only that, Bluetooth technology also provides us with more secure communications security. Access control devices using Bluetooth technology can be used in many areas. Here are some examples of these: Gating areas: As mentioned above, products using Bluetooth technology can greatly ease the wiring work in smart card systems, making the replacement of products become very easy.

Industrial automation: In this area, Bluetooth devices can replace the connection between the computer and other devices, making its connection more reliable. In addition, we can also use Bluetooth to build a wireless LAN. Energy, Oil, and Natural Gas: There are generally a large number of valves, pipes, and electrical lines in these areas. We can configure Bluetooth-enabled sensors at key locations so that we can keep abreast of the above-mentioned conditions. In the event of a dangerous situation, the relevant personnel can respond in the shortest possible time.

FIN is a weakness in cyber attacks. Attackers can easily obtain the user's FIN. The solution to this problem is: the choice of PIN should be as long as possible, the longest can choose 128-bit length. In addition, we can also use some key exchange protocols. Key exchange protocols, etc. The address of the Bluetooth device will also give the cyber attacker an opportunity. The device address serves as the unique identifier of the identification device. If it is forged, the communication process using the device address as a parameter will have no secret. The countermeasure for this kind of security problem is to use different link keys for each communication, especially when communicating with different devices.

As an emerging technology, compared with other similar technologies, Bluetooth technology considers many factors in the design process, and has the following main features: high operating frequency, strong anti-interference, easy use, voice support, and no need for base stations. ; Small size, low power consumption; can be multi-way multi-directional link; strong confidentiality.