摘要
云存储可为用户节省数据管理开销和实现资源共享。由于云服务器不安全,为保证数据的安全性和隐私性,提出一种面向云存储的无证书可搜索加密方案,方案中的部分密钥生成器仅知晓用户的部分私钥。方案的设计采用了双线性对、哈希函数、点乘运算等密码学知识。在随机预言机模型下,证明了所提方案在双线性DH问题下具有选择关键词攻击不区分性的安全性。最后,分析了所提方案的计算代价和通信代价。
The cloud storage can save data management overhead and achieve resource sharing for users. As the cloud server is not safe,to ensure security and privacy of the data, a certificateless searchable encryption scheme for the cloud storage is proposed. In the scheme, partial private key generator can only know partial private key of the users. The design of the proposed scheme adopts the knowledges of bilinear pair, hash function, point multiplication, and so on. In the random oracle model, it is proved that the proposed scheme has the safety of selecting keyword attack indistinguish ability for the bilinear DH problem. Finally, the computation cost and the communication cost of the proposed scheme are analyzed.
出处
《南京邮电大学学报(自然科学版)》
北大核心
2017年第6期90-97,共8页
Journal of Nanjing University of Posts and Telecommunications:Natural Science Edition
基金
国家自然科学基金(61672174)
广东省自然科学基金(2017A030307027)资助项目
关键词
云存储
无证书可搜索加密
部分密钥生成器
随机预言机模型
cloud storage
certificateless searchable encryption
partial private key generator
random oracle model