A semiconductor device equipped with a fuel cell of the present invention includes a fuel cell and a semiconductor element, and the fuel cell includes an anode separator in which a flow channel for fuel is formed, a cathode separator in which a flow channel for oxidizer is formed, and a membrane electrode assembly interposed between the anode separator and the cathode separator. The integral structure including an antenna and a shielding cover comprises an antenna, a shielding cover, a first conducting plate and a second conducting plate, where the antenna is used for signal transmitting and receiving, and the shielding cover can avoid electromagnetic interferences to a wireless product. The system further includes an input loudness detecting section for detecting a first loudness of the inputted voice, and a loudness control section for controlling a second loudness of the voice subjected to the filter operation to match with the first loudness. Once the encrypted data block is read, the encrypted data block is decrypted using the regenerated keystream.