Method and apparatus for machine-to-machine communication

According to the 1st mode of the present invention, in a machine two machine system, in order to reduce operation load of broker entity 11, maintaining security of data for processing, a method of transferring processing of data partially at least is provided. The broker entity 11 plays a role of a link between application nodes 12 which require data offer node 13 and the data of a sensor network which provides the data. In the method, it follows having received a demand of processed data from the application node 12 in the broker entity 11, A data offer node which provides the data for processing is judged, and a data key for the data offer node 13 concerned is generated, A data-processing algorithm for processing the data based on the demand is generated, the data key is transmitted to the data offer node 13, and the data key and a data-processing algorithm are transmitted to remote data-processing entity 15. In the data offer node 13, the data is enciphered using the data key, and the enciphered data concerned is transmitted to the data-processing entity 15. In the data-processing entity 15, the data is decoded using the data key, the data is processed using the data-processing algorithm, and the processed data concerned is transmitted to the application node 12.