I was surprised to find out today that condominium, garage etc. access cards can be duplicated and used without being registered with the reader system. Are these RFID cards? Does it mean that store-value cards for transportation can also be duplicated?!
My understanding was that each RFID card has a GUID that is "burned" into the card. When the card reader reads the card, it will match the unique GUID with the system records to make sure it is registered with the system before granting access. Is this not the case?
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