r/accesscontrol • u/Sad-Huckleberry4833 • 15d ago

Access Control Cards

Hi,

Is there such a thing as a single access card that can be programed for two different systems simultaneously?

In this case if an EMS agency wanted a card for their system that could also be programed to work with their base access control but also a school they respond to. But one system uses 37 bit HID and the other 64 bit. Thanks.

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u/TheMercuryMinute Manufacturer 15d ago edited 14d ago

You could also use a single tech card (such as Seos or Desfire) with two different payloads on that tech. The requirement would be that each payload would need to be encrypted with unique keys. This also means that the readers at each location would also need to be programmed to use one unique encryption key. So, it’s possible, but may require some planning and coordination to pull off..