计算机科学 ›› 2016, Vol. 43 ›› Issue (5): 122-126.doi: 10.11896/j.issn.1002-137X.2016.05.023
谢丽霞,薄夫宽,赵彬彬
XIE Li-xia, BO Fu-kuan and ZHAO Bin-bin
摘要： 为解决现有云存储访问控制模型用户权限撤销效率低、无法适应大规模用户的问题,在分析基于属性加密的密文策略的基础上提出了一个新的模型,给出了虚拟分组撤销策略,将用户映射到多个虚拟分组中,并重新构建了访问结构。用户权限撤销的范围被限制在一个虚拟分组内,对该虚拟组内的用户重新分发密钥即可实现用户权限撤销,而其它虚拟分组不需要任何变化,从而提高了用户权限撤销的效率。在Hadoop平台下进行了仿真实验,结果表明该模型具有较高的撤销效率。
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