網路技術運用在企業上，可大量降低投入資訊的相關成本並提升行政效率，而高速的資料存取、可靠的加密機制、正確的身分確認及適當的存取控制系統，一直是網路安全所追求的目標，其中跨網域之間的身分認證及存取權限控制，是不可避免的問題，本研究將提出一個植基於橢圓曲線離散對數及隨機背包難題的身分認證及存取方法，讓合法的使用者可以在所授予的權限範圍內快速且安全的存取資料，預期貢獻為：(1)管理單位可根據個別使用者彈性提供不同權限服務。(2)使用者可安全的跨不同系統中心取得服務。(3)透過自我認證機制達到可攜性，以增進使用者的便利性。

Network technology used in the enterprise can greatly not only reduce the cost of investment in information, but also enhance administrative efficiency. Network security has always been the goal to provide high-speed data access, reliable encryption mechanism, proper identification and appropriate access control systems. Cross-domain identity authentication and access control is the inevitable question. This study will propose an authentication and access method based on elliptic curve discrete logarithm problem and random knapsack. Legitimate users can quickly and security access to information in the range of authority. Our expected contributions are: (1) management units can flexibly provide different rights for the users. (2) users can obtain services across system centers securely. (3) this scheme can achieve portability through self-certification mechanism to enhance the user's convenience.