A friend moved to a brand new apartment complex with RFID keys. They wanted to give me a key for backup, but it turns out the complex charges $30 a month per copy.
Turns out, their keys are MIFARE Classics, which have been known to be vulnerable to cloning as early as 2008, 10 years ago! Better and faster cloning techniques have even emerged since then, making it possible to clone the key with even cheap USB-based RFID readers. We were shocked to learn that the apartment complex had chosen this known-bad technology. The Proxmark is a swiss-army knife of RFID exploration, and would make it even easier.
We didn’t clone friend’s key, but we did think about it…
