By analyzing the traditional workflow access control models and UCON core model, a UCONTR model based on UCON and capable of supporting distributed workflow is proposed in this paper. The introduction of role and task is the critical differentiator of UCONTR relative to UCON. Then formalized description and analysis of the model are presented. Finally, the implemental architecture of UCONTR model in distributed, multi-domain environment is provided. With the redefinition of role and task and the introduction of domain, UCONTR model resolves traditional workflow access control models’ limitations existing in their implements in distributed, multi-domain environment and has features of highly dynamic authorization and versatile authorization mechanism and the requirements of modern access control can be satisfied better.
['Zetao Jiang', 'Jiafei He', 'Shuo Hu', 'Bina Zheng']
Research on an UCON Model Supporting Distributed Workflow