存取控管(Access Control)是網路應用程式(Web Applications)安全防護中的核心課題。貫徹存取控管的程式碼往往必須嵌入到應用系統的各個模組中，具有橫跨(cross-cutting)的特性，卻也因此常常造成系統中反覆出現類似的程式碼以及不同需求的程式碼夾雜不清的現象。所以學界業界紛紛提出了許多可設定式(configurable)的存取控管機制來解決此一問題。但這些機制都著重在一般功能性(function-level)的存取控管，對於較細緻化(fine-grained)的資料存取(data-level)控管，並未提供設定式的控管方式，還是得透過程式化(programmatic)的方式處理，所以仍然有程式橫跨性的問題。 最近興起的剖面導向程式設計(Aspect-Oriented Programming)基於關注分離的原則(Separation of Concerns)，針對像安全橫跨性的需求，倡議在原有的物件或函式模組外，另以剖面作為這些橫跨性需求的模組單位，既可集中開發又可依規則將安全程式碼整合至系統的各個模組。因此本研究將以AOP技術來設計與製作一套可設定式的細緻化存取控管服務與工具。 / Security is attracting more and more concerns in the development of Web applications. However, it is not easy to derive a robust security implementation for Web applications. The principle difficulty in designing security such as access control into an application system is that it is a concern that permeates through all the different modules of a system. As a result, security concerns in an application are often implemented with scattered and tangled code, which is not only error-prone but also makes it difficult to verify its correctness and perform the needed maintenance. Aspect-Oriented Programming (AOP) is a relative new design method that allows a programmer to isolate some of the code that crosscuts his program modules into a separate module, and thus realizes the concept of Separation of Concerns. AOP offers significant advantages to programming over traditional OO techniques in implementing crosscutting concerns such as access control. In this thesis, we define an XML schema for specifying fine-grained access control rules for Web applications in a configuration file and devise an aspect-oriented implementation scheme. Specifically, we develop an aspect synthesis tool that generates concrete access control aspects automatically from access control rules. These aspects, after woven into the base application, will enforce proper access control in a highly modular manner. As a result, we get a configurable implementation of access control that is not only adaptive but also effective.