unlike excessively complex and extremely expensive methods in the prior art , this invention discloses a highly cost - effective and simple - to - use device for transferring data unidirectionally , allowing small businesses and home users to reap the benefits of advanced network security , which otherwise would have been affordable and attainable exclusively by commercial and federal entities . because of its cost effectiveness and simplicity , the device of this invention makes it possible for every computer user to protect their internal networks from information thieves .