• 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

• 高性能计算 • 上一篇    下一篇

CRSHE:基于同态加密的新型密文检索方案

付伟1,李墨泚2,赵华容2,吴勇2   

  1. (1.海军工程大学信息安全系,湖北 武汉 430033;2.海军密码管理中心,北京 100841)
  • 收稿日期:2017-01-03 修回日期:2017-08-15 出版日期:2018-09-25 发布日期:2018-09-25
  • 基金资助:
    国家自然科学基金(61672531);总装后勤科技重大项目(AWS14R013)

CRSHE: A novel ciphertext retrieval scheme
based on homomorphic encryption

FU Wei1,LI Moci2,ZHAO Huarong2,WU Yong2   

  1. (1.Department of Information Security,Navy University of Engineering,Wuhan 430033;
    2.Navy Cryptogram Management Center,Beijing 100841,China)
     
  • Received:2017-01-03 Revised:2017-08-15 Online:2018-09-25 Published:2018-09-25

摘要:

针对文本密文存储与检索需求,提出一个检索与共享功能分离的云存储模型,在此基础上设计了一种同态加密算法,并给出一种新型同态密文检索方案CRSHE。可有效解决检索关键词隐私泄漏、不支持同态加密等问题,通过排序反映文档与关键词之间的相关程度,在多关键词检索时极大地提升检索性能。测试实验表明,该方案比线性密文检索方案效率高,具有较高的准确性。
 

关键词: 云计算, 云存储, 密文检索, 同态加密

Abstract:

Aiming at the storage and retrieval requirements of ciphertext, we propose a new cloud storage model with separate retrieval and sharing functions. We first design a homomorphic encryption algorithm and propose a novel ciphertext retrieval scheme, namely CRSHE based on the model. It solves the problem of keywords privacy leakage and provides support for homomorphic encryption. The retrieval results can be sorted to reflect the correlation degree between documents and keywords, which greatly improves the retrieval performance in multikeyword retrieval. Experimental results show that the scheme is more efficient and accurate than the traditional linear ciphertext retrieval scheme.
 
 

Key words: cloud computing, cloud storage, ciphertext retrieval, homomorphic encryption