First, let’s talk about the concept of degaussing.
There is a magnetic strip on the back of the bank card. It uses the same principle as a magnetic tape to store information. When it is close to magnetic materials such as magnets, the strong magnetic field will destroy the information on the magnetic strip, which is called degaussing. .
The second-generation ID card uses a completely different concept. It uses a radio frequency coil and a new semiconductor chip to simultaneously store and read information. Even if you use a large magnet to get close to it, it will There will be no damage to the information in it, but it may be damaged due to errors in the card reader's reading and writing process, but the probability is extremely low.