in hotels, if you lose your room key card, how are they able to reprogram the new one so it works and the old one doesn’t?

Question

Is there some system that transmits information to your door card reader on what the new key is, or is it something different entirely?

In: 1028

Answer 1

You can search for RFID and MIFARE.

And also the device in the door is connected to the local area network, in other words to the reception’s computer.

Basically first, they identify the card and they enter its id into the system, like “The card with id t56hr54y6tuuj is for this door. The previous id, gı565ujtu5u is no longer valid for that door”. And then the job is up to the device in the door, it connects to thr recepgion computer each time it reads an RFID card, compares the ids and decides tonoprn or not.