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论文类型：期刊论文

发表时间：2011-11-01

发表刊物：ICIC Express letters

收录刊物：EI、Scopus

卷号：5

期号：11

页面范围：4143-4148

摘要：The User Authorization Query (UAQ) problem is among the core considerations in Rbac model, while the restriction and the hierarchical relationship of users, which play as roles, complicate the UAQ problem. Taking the factors of role constraints, authority safety coefficient and role hierarchy into consideration, this paper formulates the user authorization problem into the Duty-Permission-Hierarchy (DPH) model based on the Rbac model. The probability factor is introduced to improve the traditional solving algorithm by gradually pruning the search space through the proposed Reduce Domain (RD) strategy in this study. A numerical simulation case testifies better convergence rate and calculation efficiency of the algorithm. ? 2011 ICIC International.