This invention provides an input switchover means for switching input routes according to the type of medium or communications, a software management means for decoding encrypted software information and for managing monetary charges according to the usage amounts of this software, an information conversion section for converting decoded data outputted from the previously mentioned software management means to visible or audible data, and an output route switchover means for outputting to the previously mentioned software management means encrypted software data, and for outputting to the previously mentioned information conversion section non-encrypted software information.