security management. The exchange of information
between access Controller and control hosts is done via
Ethernet, delivering content easily intercepted and
analyzed, this need to ensure the security that information
transfers, including the following:The confidentiality of
user authentication. The access controller sends user
authentication to the control host, needs for user
authentication is encrypted, so even if the related message
was intercepted can not easily analyze user authentication,
to prevent the user identity to be imitated;The open door
command of the host is not forged. Malicious users can not
open the door by intercepting and analyzing the original
message format, forged a new open host control
command;Mutual authentication between the access
controller and the host. Both can accurately identify
whether the content of messages sent each other, even if a
malicious user to fake IP addresses, etc. can not deceive.