A Trust Degree Based Access Control for Multi-domains in Grid Environment

The grid security focuses on implementation of safe access for resource of different domains in dynamic grid environment. Trust as an important factor in grid security is increasingly applied to management of security. But the research of application with trust to access control is rare and coarse. In this paper, we propose the concept of trust degree which is the measurement of trust and combine it with access control framework. A fine-granularity access control model has been realized in a single domain and the trust degree based access control framework accomplishes the work to access resource across multi-domains. Conversion between domains is correct and effective. Simulation results present that the access control model is practicable and credible.

1. Introduction

The grid problem is to enable “coordinated resource sharing and problem solving in dynamic, multi-institutional virtual organizations.”[1]The features of virtual organizations(VOs) introduce challenging security. Dynamic formation and management of VOs is a large and unpredictable task. Resources and users of VOs are often located in distinct administrative domains. The research work of grid security is mainly about integrations of security policies, mutual operations of resources and trust across multi-domains.