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I cloned my apartment key-fob The WeWork key-fob uses rolling codes so couldn't use it for that...

• tpetr 3y ago
  Which WeWork do you belong to? Boston’s are all low-frequency rfid
  • arthurcolle 3y ago
    This is one in SF. I can clone the card, and it'll work, but then within a few days it won't work any longer.
    • ThePowerOfFuet 3y ago
      Does the original keep working?
      • arthurcolle 3y ago
        Yes
• EricBetts 3y ago
  Do you recall any of the details? "Rolling code" is not a term often associated with RFID/NFC. The Portland Custom House WeWork used HID Prox.
  • hnav 3y ago
    Basically the reader writes data back to the fob and expects to see it the next time it reads it. This results in either the original or the copy getting de-synced. One interesting capability that this unlocks is that battery powered, offline readers (think apartment door that uses the same fob as the lobby) can write out things like battery state so that apartment maintenance knows when it's time to swap out batteries.