云计算环境下基于密文策略的权重属性加密方案  

Ciphertext-policy Weighted Attribute-based Encryption Scheme in Cloud Computing

作　　者：刘西蒙[1] 马建峰[2] 熊金波[2] 李琦[2] 张涛[2] 朱辉[1,3] 

机构地区：[1]西安电子科技大学通信工程学院,陕西西安710071 [2]西安电子科技大学计算机学院,陕西西安710071 [3]网络与数据安全四川省重点实验室,四川成都611731

出　　处：《四川大学学报（工程科学版）》2013年第6期21-26,共6页Journal of Sichuan University (Engineering Science Edition)

基　　金：长江学者和创新团队发展计划资助项目(IRT1078);国家自然基金重点项目(U1135002);国家自然科学基金项目(61370078);国家科技部重大专项项目(2011ZX03005-002;2012ZX03001009);中央高校基本科研业务费项目(JY10000903001);陕西省自然科学基金项目(2011JQ8042)

摘　　要：在综合分析现有基于密文策略属性加密方案的基础上,针对现有基于密文策略属性加密方案较少考虑属性权重的现状,将权重的概念引入到基于密文策略的属性加密方案中,提出了基于密文策略的权重属性加密方案,证明了在选择权重属性集模型下安全性。并将此方案引入到云计算环境下,给出了系统级的基于密文策略的权重属性加密方案。分析表明,基于密文策略权重属性的加密方案相比现有方案更适用于云计算环境。By analyzing existing ciphertext-policy attribute-based encryption scheme, ciphertext-policy weighted attribute-based encryp- tion scheme was proposed. To solve the existing scheme without considering the attribute with weight, the concept of weight was adopt- ed into ciphertext-policy attribute-based encryption scheme. Meanwhile, the security of ciphertext-policy weighted attribute-based en- cryptiou scheme was proved under the selective-weighted attribute model. Moreover, the ciphertext-policy weighted attribute-based en- cryption scheme was given which has effective application in secure cloud computing environment. Analysis showed that the present scheme is more appropriate for the cloud computing environment than the existing schemes.

关 键 词：云计算 访问控制 公钥密码学 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]