The RFID access control keyfobs and cards are the most commonly used. Currently, the keyfobs and cards used for access control include those with low frequency chips(125 kHz), high frequency chips(13.56 MHz), and CPU chips, and they can be made into different colors and shapes. Many online users and merchants also ask whether the access control keyfobs and cards can be duplicated.
The keychain is an irregularly shaped ABS case with various shapes, which is made by encapsulating the chip coil with an ABS shell, filling it with epoxy resin, and combining them through ultrasonic welding. It can be silk-screened, inkjet-printed, and engraved with codes. It is dustproof, waterproof, and shock-resistant. There are dozens of shapes to choose from, and various types of chips can be encapsulated.
At present, access control key fobs mainly consist of inductive ID chips and inductive IC chips. The advantage of the inductive ID chip is its relatively low cost. Each person has one key fob, providing moderate security. It can be connected to a microcomputer and has door-opening records. However, the disadvantage of the chip card is that the card is easy to copy, and it is not easy to achieve two-way control. Therefore, access control key fobs or community access control key fobs during this period can all be copied, and their security is poor.
The inductive IC chip card has the advantages of contactless operation between the keyfob and the device, convenient and safe door opening, a data lifespan of at least ten years, high security, the ability to connect to a microcomputer, door opening records, and two-way control; most importantly, the HF chip is difficult to copy. Currently, with the development of market IC card technology, the cost of IC cards is gradually decreasing. Therefore, HF chips(13.56 MHz) are the mainstream in the market at this time.
At present, the cards that can be replicated on the market are all ID cards. IC cards are not easy to replicate. Now, access control keychain cards can also be encapsulated with CPU chip cards. This kind of chip is more advanced than IC cards, but the cost is much higher compared to IC cards. Therefore, when choosing access control keychain cards, we should decide according to our specific circumstances.