Degaussing refers to embedding magnetic strips in magnetic cards such as bank cards and shopping cards to store information. When the magnetic stripe is in contact with an object with a strong magnetic field, the information stored in the magnetic stripe will be destroyed and "disordered", and the behavior used to prevent this from happening is called degaussing prevention. Stealing credit cards refers to the illegal and criminal acts of copying other people's credit cards in various illegal forms and stealing cardholders' funds.