電腦網路的快速發展，其無遠弗屆、隨時隨時地可取用的特性，產生了許多新的應用，但也同時形成了網路安全上的威脅。許多組織除了架構防火牆作為第一道安全防線外，具不同技術、特性的入侵偵測系統(Intrusion Detection Systems，IDS)也被發展成為網路系統的第二層防護，以及早發現、處理可疑攻擊事件，降低網路攻擊事件造成組織重大的損失。
典型電子商務網站的會員認證與資料查詢作業，是藉由使用者端透過瀏覽器將輸入資料或查詢條件，經由網頁程式存取後端資料庫並將結果呈現在網頁上。在N-tier的架構下，雖然後端的資料庫系統大多架設在企業內部，可透過防火牆的存取控制清單（Access Control List）設定做有效的保護，但是具有惡意的使用者仍可能透過網頁伺服器此合法管道，以SQL Injection攻擊方式對資料庫做進一步的存取及破壞。
本研究提出以資料探勘技術為基礎的應用型入侵防禦系統，結合攻擊特徵比對、存取權限控管及自動警訊通報機制，可有效偵測及阻擋SQL Injection攻擊事件。
關鍵字：SQL Injection、Access Control List、資料探勘、防火牆、入侵偵測系統。

Internet cross over the restriction of the timespace and region,bring people the work and living tremendous convenience,but also forminged an information security up the larger threat.The fast development of the computer network, it is far-reaching, at any time commendable use at any time of characteristic, generate many new applications, but also forminged in the meantime the threat of the networ security。Many organizations constructed the structure of firewall as the first safe defense line,and IDS(Intrusion Detection Systems) also is developed to become the networ system of secondary protection。To find and handle suspicious hit event early, reduces the networ hit that cause to organize heavy great damage.
Member's certification and data of the typical model E-Commerce website search homework, via the user port and will feed the data or the search condition through the browser。After accessing through the web page program carry database and will present as a result on the web page。Under the structure of the N-tier, although the back carries of the database system installs mostly in the enterprise inner part, can through the access control the detailed list(the Access Control List) setting of the fire wall do a valid protection, have malevolent user still probably through the web page server this legal piping, attack mode by the SQL Injection to does further access and the puncture to the database.
This research puts forward taking sort as a basal applied type to invade to guard against system, combining to attack a characteristic compare to and access the legal power controls a mechanism, can detect and impede the SQL Injection hit event effectively, and provide the automatic caution notification mechanism.
KeyWord：SQL Injection、Access Control List、DataMining、Firewall、Intrusion Detection system。

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