If it is not a magnetic stripe card, there is no interference with each other. Only magnetic stripe cards interfere with each other
Because only magnetic cards with magnetic strips on the back can be degaussed. Cards without magnetic strips, such as bus cards, canteen cards, community access cards and second-generation ID cards, are contactless smart cards that use radio frequency identification technology; The IC phone card is a contact smart card. The information on these smart cards is stored on semiconductor chips and cannot be \"degaussed\" without the use of magnetic recording technology.
The most afraid of two access control cards together is degaussing, as long as the access control card is wrapped in paper, especially the magnetic stripe induction part, and the magnetic stripe can be put on the back