Evaluation of practical trust based access control for XML databases

In order to improve security and provide dynamic access control for XML databases, we developed trust based access control for XML databases. Trust based access control for XML databases manages the access policy depending on users´ trustworthiness and prevents unauthorized processes, malicious transactions and misuse from both outsiders and insiders. Trust scores are updated on the basis of users´ histories. Privileges are automatically modified and adjusted over time depending on user behavior. In this paper, a practical trust based access control module for XML databases is evaluated. The dynamic access control has been tested from security, scalability, and performance perspectives. The experimental results illustrate the flexibility of trust values and the scalability of the system with small to large XML databases and with various numbers of users.