Applicable range of FPN

Fig.3
Communication restraint by FW

Fig.4
Statical data of
illegal intrusion sources

Fig.5
FPN within Intranet

There seem to be two big application areas for FPN; namely one is within Intranet and the other is on the Internet. There is usually a firm firewall between Intranet and the Internet and communication between the two is greatly restricted (Fig.3).Under such circumstances, free communication between Intranet and the Internet is not practical. Therefore, we think that these two need to be controlled separately.

It is reported that in case of Intranet, damage by inside crimes is comparable to damage by intrusion from the outside world (Fig.4). The reality is, however, that security within Intranet is still weak, as it still often depends on a system using a password. If we introduce FPN here, we will be able to establish a system equipped with both security and flexibility (Fig.5).

Fig.6
FPN on the Internet

In the meantime, as the Internet further develops in the future, individual households will be connected by network largely. At that time, HFW (home firewall) will be required more than ever to protect the network system in the home, even if it may not be necessary to be as strong as the system for companies. HFW is not a system to literally interrupt communication, but the home network system is considered to be a sort of extension of the Internet. Users would want to move within and out of home freely as they communicate with each other. By introducing FPN in such an environment, a secure and flexible communication system can also be established there (Fig.6).