he Internet. This type of remote loading of applications raises a number of security risks when transmitting the application code and related data over an unsecured communications line such as the Internet.
An entity which transmits an application or data to an IC card requires that only the intended IC card should receive the transmitted data. Third parties should not be able to intercept and view the data. Additionally, a transmitting entity will require verification that the IC card which has requested information is actually part of the overall IC card system and not simply posing as being part of the system. These concerns are raised by both remote application loading as well as local terminal application loading.
Accordingly, it is an object of this invention to provide a secure transfer technique and specifically to provide a secure IC-card system that allows for the secure transfer of data including smart card applications which may be loaded onto IC cards.

1. Field of the Invention
The present invention generally relates to a vehicle air-conditioning system provided with a compressor that can be driven with a motor. More specifically, the present invention relates to suppressing the overheating of the electronic devices inside the inverter of the compressor and the overheating of the battery due to the operation a vehicle air-conditioning system having a motor driven compressor.
An example of a vehicle air-conditioning system is described in Japanese Laid-Open Patent Publication No. 2000-230482. The vehicle air-conditioning system disclosed in this publication has a hybrid compressor that is constructed such that the compression section is driven by two drive sources. In particular, a first driving force is provided by a motor that is driven by the battery, while a second driving force is delivered from the engine through an electromagnetic clutch. The vehicle air-conditioning system executes capacity limiting determination such that the refrigerant compression capacity of the compression section decrea