A plurality of image data attached to electronic mail data is stored in a memory. The support member supports the disk from below during inserting the disk into the disk drive. This metal material can be used to both enhance heat removal from the chip and to provide a new and more efficient DC biasing path for the active components on the other surface of the chip. Moreover, the present invention enables the ingredients of each layer to be tailored to the particular application. This double authentication ensures the authenticity of the program for its overall execution in the terminal and the origin of the second card, distributed through conventional channels, for the network operator.