CONTROL METHOD AND CONTROL APPARATUS FOR OUTPUT OF INFORMATION LEAK PREVENTION SIGNAL

PROBLEM TO BE SOLVED: To prevent information from being leaked by reproducing an electromagnetic wave radiated from information equipment. SOLUTION: The control apparatus for output of information leak prevention signal comprises: an information leak prevention device 1, a clock signal extracting section 11, a clock signal generating section 12, a prevention signal generating section 13, a prevention signal generating circuit 131, an output amplifier 132; a prevention signal output section 14; a leak signal receiving section 15; a leak signal receiving sensor 16; a prevention signal adjusting section 17; the information equipment 2; and a serial signal interface (information signal interface) 3 of the information equipment 2. In accordance with strength of a leak signal from the information equipment, an information leak prevention signal output level is adjusted and while suppressing to a minimum the influence to be exerted upon a surrounding electromagnetic environment by an output prevention signal, the information leak prevention signal is output at a level corresponding to electromagnetic wave radiation property of the information equipment. COPYRIGHT: (C)2007,JPO&INPIT