Identifying weak points of network systems and
protecting them (before attackers or hackers detect
and use our data to attack our systems) are regarded
as essential security methods, especially on the LAN
system which uses ARP Protocol with holes enabling
hackers to conduct ARP Spoof and sniff Packets on the
LAN systems. Regarding websites with membership
systems such as e-commerce websites and websites
with e-mail systems such as Hotmail and Gmail, every
time users click links, Browsers will send away HTTP
requests which contain Cookies and Session ID. If
hackers successfully sniff Cookies and Session ID of
any member, they will be able to access the member’s
system by the right of that member.