近年來數位行動裝置普及，加上政府大力推廣，越來越多人使用無線網路，透過手中的行動裝置，很容易就可以連上無線網路，也因為無線網路的便利，讓許多惡意的攻擊者有了新的管道，加上無線網路設計的固有缺陷，所以無線網路的安全問題在最近這幾年來是相當的重要。
無線網路可以分為兩大種類，一種是需要基礎建設的架構，另一種則是不需要基礎建設的無線隨意行動網路(mobile ad hoc networks, MANETs)，其中又以無線隨意網路最為容易使用。在本論文中，我們針對無線隨意網路的路由安全進行探討，並且介紹一個新的路由協定 SAODV ，這個新的路由協定可以加強無線網路安全，儘管此路由協定可以防禦修改路由封包 (control packet) 的攻擊，卻無法給予惡意的攻擊節點反抗，只能任由攻擊節點一直發送錯誤封包，干擾其他節點，此外 SAODV 路由協定還有些攻擊是防禦不了的。因此，我們提出了分散式的入侵偵測系統來協助 SAODV 進行防禦，比起在 AODV 上架設入侵偵測系統，使用 SAODV 能夠有基本的抵抗能力，可以減輕入侵偵測系統的負擔，讓系統專注於其他攻擊的偵測。

In recent years, mobile appliances are in widespread use. Due to the popularizing wireless network by government, there are more people starting to utilize them.
There are two categories in wireless network, i.e., infrastructure and ad hoc networks. Due to the infrastructure-less property of the ad hoc network, ad hoc network is more convenient, which makes the ad hoc networks get popular recently. To set up a securing wireless ad hoc network, we should focus on the routing protocol. A new and securing routing protocol, SAODV, can protect routing packets from being modified. However, there are some exploits in this protocol. In this paper, we propose an environment with built-in intrusion detection systems in order to get rid of these defects. We avoid some specific attacks by using securing routing protocol, and detect the others by using intrusion detection system. Therefore, the loading of intrusion detection system can be reduced so that the IDS could aim at detecting attacks.

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