隨著行動裝置日漸普及，讓使用者可以隨時隨地透過網路使用服務，加上物聯網技術逐漸落實到日常生活中，實現遍布式計算的概念。未來在公共空間中，可以整合環境中的裝置，建置一個公用資源服務平台，讓欲使用服務的使用者，可以使用公用資源服務，使環境中的閒置設備能夠被充分利用。我們提出一個適用於開放式環境中，提供公用資源服務平台的系統架構、功能結構和使用流程，並設計一個以辨識使用者角色為基礎的身分鑑別機制，讓持有行動裝置的使用者能夠安全地取用服務。
在本研究中，我們結合公開金鑰密碼系統、雜湊演算法和JSON Web Token，來設計一套身分鑑別機制，應用於開放式公用資源服務平台上，並以大學中的系所辦公室為環境下，實作本平台的雛型系統，提供身分鑑別與公用資源服務的功能。經由分析的結果表明，本機制可以達到安全性需求，並提供良好的系統通用性、易用性及服務擴展性，適用於開放式環境下的公用資源服務。

With the growing popularity of mobile devices, users can access services through the Internet from anywhere at any time. Besides, the Internet of Thing technologies are gradually implemented in our daily life. The concept of pervasive computing will be realized. In the public space, service provider can integrate the devices in the environment to build a public resource service platform. The user can use this platform to access the public resource services. Therefore, the idle resources can be fully utilized. We design the public resource service platform and authentication mechanism for open environment, so that people can use mobile devices to access services safely.
In our research, we combine public-key cryptography, hash algorithm and JSON Web Token to design an authentication protocol for open public resource service platform. We build the prototype system based on office of college to provide authentication and public resource services. The analysis shows that the proposed protocol can achieve security requirements and provide great system commonality, usability and service scalability for public resource service in public environment.

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