摘要
目前多授权机构基于属性的加密方案(MA-ABE)限制每个属性在访问结构中只能出现一次,属性重复编码将导致系统效率降低,为此提出一种自适应安全的属性可重复的MA-ABE方案(AP-MA-ABE)。该方案在标准模型下是自适应安全的,将其应用到云存储系统中,实现在服务提供商不可信前提下,由数据提供者定义数据的访问控制策略,保证数据的安全性。性能分析结果表明,当加密使用的访问结构中出现1次属性重复时,该方案密文长度和解密速度与现有MAABE方案相当,当出现多次属性重复时,该方案具有优势。
Previous multi-authority attribute-based encryption（MA-ABE）schemes limit each attribute to appear only once in the access structure and they suffer from superfluous computation overhead on repetitive encoding technique.To solve this problem,an adaptively secure and attribute repeatable multi-authority ABE（AP-MA-ABE）scheme was proposed and verified to be adaptively secure in the standard model.Through applying this scheme in cloud storage system,the security of data was ensured by the access control policy which defined by data provider,on the premise of incredible service provider.Performance analysis indicates that the sizes of ciphertext and the pairing computation of decryption using this scheme are equal to the previous MA-ABE scheme when one attribute appears twice in the access structure,while this scheme is more efficient when more attributes repeat in the access structure.
出处
《计算机工程与设计》
北大核心
2016年第8期1981-1985,共5页
Computer Engineering and Design
基金
国家973重点基础研究发展计划基金项目(2011CB311801)
关键词
云存储
访问控制
属性基加密
多授权机构
属性可重复
自适应安全
cloud storage
access control
attribute-based encryption
multi-authority
attribute repeatable
adaptively secure
