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In order to satisfy dynamic authorization in service-oriented grid environment, a context and trust-based grid service authorization model (CTGSA) is proposed. First, model is defined formally. Benefiting from the mapping relation of user-role, role-service and service-resource assignment, model can provide authorization using service-oriented method, which reduces the management overhead greatly...
The grid cross domain authorization has been a research hotspot in the information security held. The existing gird cross-domain authorization mechanisms are not flexible and intelligent enough. To solve the problem we propose a grid authorization model based on the description logic (DL) and the attribute based access control (ABAC). The DL formulates the definition and representation of attributes,...
Policy composition is an essential requirement of grid access control, not only because of the integrity of local and global policies, but also the dynamic collaboration under jointly controlled policies among multiple partners across different domains. In this paper, we propose an algebra for compositing attribute-based access control policies. Traditional arithmetic operators are extended and semantically...
A grid system is a virtual organization that is composed of several autonomous domains. Security in such a system needs to be flexible and scalable to support multiple security policies. Basing on the special security requirements of VO-management, we propose a security architecture that can support multiple authentication policies in a VO to provide scalable and flexible VO-wide authentication, role-based,...
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