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

The key hold a value assigned at the desk, the door lock can give enough power to the key so it can read what value that key has, if the lock recognize the key it unlocks. Any blank card can be programmed with the values you want