摘要
叛徒追踪和撤销是属性基加密(ABE)需要解决的问题。目前满足自适应安全且可追踪并撤销叛徒的ABE方案(ABTR)在合数阶群上构造。针对合数阶群上双线性配对计算开销过大的问题,首先利用对偶向量空间技术,提出了一个素数阶群上具有扩展通配符的ABE方案(PGWABE);然后以对偶系统加密为基础,通过构建一系列两两不可区分的攻击游戏证明了该方案是自适应安全的;最后利用完全子树构架,将PGWABE方案转变为素数阶群上可追踪并撤销叛徒的ABE方案(PABTR)。性能分析表明,与ABTR方案相比,PABTR方案在同等安全性上效率更高。
Traitor tracing and revocation is crucial to the use of attribute-based encryption( A B E ) . The previous adaptively secureABE schem e for traitor tracing and revocation together ( ABTR) suffered from superfluous computation overhead in that itwas designed on composite order groups. To tackle this problem , this paper proposed an ABE schem e with generalized wildcardson prime order groups (PG W A B E ) while applying dual pairing vector space approach,and proved the proposed schemeadaptively secure on the basis of dual system encryption along with a sequence of attacking games which was indistinguishablefrom each other. Furthermore, with the aid of complete subtree, this paper transformed PGWABE into an attribute-based encryptionschem e for traitor tracing and revocation together on prime order groups ( PABTR) . Performance analysis indicatesthat compared with ABTR schem e, PABTR schem e is more efficient on an equivalent security level.
作者
李作辉
陈性元
Li Zuohui;Chen Xingyuan(Institute of Security Engineering, Information Engineering University, Zhengzhou 450001 , China)
出处
《计算机应用研究》
CSCD
北大核心
2016年第10期3088-3093,共6页
Application Research of Computers
基金
国家"973"计划资助项目(2011CB311801)
关键词
属性基加密
叛徒追踪
撤销
完全子树
素数阶
对偶系统加密
attribute-based encryption
traitor tracing
revocation
complete subtree
prime order
dual system encryption
