System and method for killing a RFID tag

A method for using a disabled radio-frequency identification (RFID) tag, the method comprising:

• measuring a signal strength of a signal received at an antenna of the RFID tag;
• responding to an instruction in the received signal if the signal strength exceeds a specified threshold;
• and
• responding to the instruction if the signal strength does not exceed the specified threshold but the instruction meets a specified criterion.

A radio-frequency identification (RFID) tag comprising:

• a radio frequency (RF) unit coupled to an antenna, the RF unit is configured to perform analog signal processing on a signal provided by the antenna, the RF unit comprising
• a RF circuitry unit configured to amplify, detect and filter the signal;
• a signal processor coupled to the RF circuitry unit, the signal processor is configured to manipulate the signal;
• a processor coupled to the RF unit, the processor is configured to respond to instructions carried in the signal;
• and
• a memory coupled to the processor, the memory to store data and instructions.