4 ms·

Only if it's implemented poorly

• Retric 15y ago
  Most systems are implemented poorly. However, even even with encryption as long as you don't authenticate with an online server somewhere once you have physical access to the device is almost impossible to prevent someone from copying the internal key's. You might end up producing 50,000 identical devices that are easy to track after the fact but they can be sold before those defects are noticed at which point they can just swap to the next set of key's. Worse yet most 'secure' RFID systems just retransmit the same key every time and trust repeated use to be detected by other systems.