Abstract: A system comprises a network of sensors inside a cargo container, each sensor capable of generating sensor information pertaining to the environment within the cargo container; an operation center; and a device (e.g., a lock) outside of the cargo container capable of communicating with the network of sensors (possibly using a wireless standard) and with the operation center (possibly using a satellite or cellular network), capable of receiving the sensor information, and capable of reporting a message based on the sensor information to the operation center. The sensor network may include an arrangement of temperature sensors, humidity sensors, radioactivity sensors, chemical/biological toxin sensors, chemical explosive sensors, vibration sensors, sound sensors, collision sensors, and/or light sensors. The device may include a communication module capable of communicating with other device on other containers. The operation center may monitor messages received from the devices to determine proper responses.