Maeda-san frowns, and says, "In a sense, it is a virtual computer. A simulation. To discourage illegal intrusions, many computer systems have installed software systems that put up a false front or a mask that simulate all the functions of the native host, or actual computer operating systems. Like the native host, the simulation has access nodes and datastores, but nothing done to the simulation can affect the native host. And usually all the data in the stores of the simulation are watered down or filtered in certain critical respects so as to be of no use to illegal intruders."