摘要
针对云计算环境下成员关系复杂多变的特点,本文在属性加密机制CP-ABE-DM的基础上,提出了一个安全的属性加密机制S-CP-ABE-DM,并在标准模型下给出了安全性证明.S-CP-ABE-DM继承了CP-ABE-DM的优点,支持动态成员管理和任意属性值,修补了CP-ABE-DM的安全漏洞,能够抵御本文构造的针对CP-ABEDM的攻击.实验结果显示与已有的属性加密方案相比,S-CP-ABE-DM更适合用于保护云计算环境下用户数据的安全性和隐私性.
According to the complex membership under cloud computing environment,this paper proposes a secure attribute-based encryption scheme S-CP-ABE-DM based on CP-ABE-DM.Besides,we prove in the standard model that our scheme is secure.S-CP-ABE-DM inherits the advantages of CP-ABE-DM,supports dynamic membership and arbitrary-state attributes.S-CP-ABE-DM also avoids the security vulnerability of CP-ABE-DM,resists the attack on CP-ABE-DM constructed by this paper.Compared with the existing schemes,S-CP-ABE-DM is more suitable to protect the security and privacy of user data in cloud computing environment.
出处
《武汉大学学报(理学版)》
CAS
CSCD
北大核心
2015年第4期375-383,共9页
Journal of Wuhan University:Natural Science Edition
基金
信息保障技术重点实验室开放基金(KJ-13-104)
关键词
云计算
属性加密
动态成员管理
任意属性值
双线性对
cloud computing
attribute-based encryption
dynamic membership
arbitrary-state attributes
bilinear pairing