Intrusion detection sensor detecting attacks against wireless network and system and method of detecting wireless network intrusion

A wireless network intrusion detection system providing wireless communication to one or more wireless terminal, the system comprising:

• an access point providing wireless communication to the wireless terminal;
• and
• an intrusion detection sensor examining packets transmitted and received between the access point and a wireless terminal according to a predetermined detection rule,
• wherein the access point transmits confirmation information on whether or not an event packet, including critical information on whether or not a wireless line connection between the access point and the wireless terminal is established, is transmitted, to the intrusion detection sensor, and the intrusion detection sensor examines an event packet by using the confirmation information.

A wireless network intrusion detection method providing wireless communication to one or more wireless terminal, the method comprising:

• examining ordinary packets transmitted and received between an access point providing wireless communication to the wireless terminal and the wireless terminal, according to a predetermined detection rule;
• identifying an event packet, including critical information on whether or not a wireless line connection between the access point and the wireless terminal is established, among the ordinary packets;
• if the event packet is identified, receiving confirmation information from the access point on whether or not the event packet is transmitted;
• and
• examining the event packet by using the confirmation information.