A simple trip-wire or magnetic circuit associated with a shipping container provides continuity, which is detected electrically. Simply, if continuity is disabled by a forced entry of the container, electrical detection means, such as a radio-frequency-identification (RFID) tag, will alert the owner...http://www.google.de/patents/USRE42777?utm_source=gb-gplus-sharePatent USRE42777 - Anti-theft method for detecting the unauthorized opening of containers and baggage
