• 中国计算机学会会刊
  • 中国科技核心期刊
  • 中文核心期刊

计算机工程与科学

• 计算机网络与信息安全 • 上一篇    下一篇

公开信道下多服务器多关键词多用户可搜索加密方案

郎晓丽,曹素珍,刘祥震,张玉磊,王斐   

  1. (西北师范大学计算机科学与工程学院,甘肃 兰州 730070)
  • 收稿日期:2018-10-08 修回日期:2019-06-13 出版日期:2019-12-25 发布日期:2019-12-25
  • 基金资助:

    国家自然科学基金(61662071,61662069,61462077)

A multi-server multi-keyword multi-user
searchable encryption scheme under public channel

LANG Xiao-li,CAO Su-zhen,LIU Xiang-zhen,ZHANG Yu-lei,WANG Fei   

  1. (College of Computer Science & Engineering,Northwest Normal University,Lanzhou 730070,China)
  • Received:2018-10-08 Revised:2019-06-13 Online:2019-12-25 Published:2019-12-25

摘要:

可搜索加密服务中,为了避免服务器集中检索从而推测出密文关键词信息,数据属主希望将不同的数据密文与关键词索引分别存储在不同的服务器上。结合多用户可搜索加密方案和多服务器特性设计了一种公开信道下多服务器多关键词多用户可搜索加密方案。数据属主和数据用户利用服务器的公钥生成密文索引与陷门搜索凭证,满足在公开信道中传输。分析结果表明,新方案具有较低的通信代价,并且在随机预言机模型下基于判定性Diffie-Hellman问题假设证明了新方案在适应性选择关键词攻击下密文索引不可区分。
 

 

 

关键词: 可搜索加密, 多用户, 多服务器, 公开信道, 密文关键词索引不可区分

Abstract:

In the searchable encryption services, data owners wish to store different data ciphertexts and keyword indexes on different servers, so as to avoid centralized search of servers and infer the ciphertext information. A multi-server multi-keyword multi-user searchable encryption scheme under public channel is proposed by combining multi-user searchable encryption and multi-server features. This scheme allows data owners and users use the cloud servers' public keys to generate ciphertext indexes and search trapdoors, thereby satisfying the transmission under public channel and reducing the communication cost. The analysis results show that the proposal has lower communication cost. In the random oracle model, the proposed scheme is ciphertext index indistinguishable under the adaptive selection of keyword attacks in the decisional Diffie-Hellman problem.

 

 

Key words: searchable encryption, multi-user, multi-server, public channel, ciphertext keyword index indistinguishable