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Simple, Secure, and Efficient Searchable Symmetric Encryption with Multiple Encrypted Indexes

  • Takato HiranoEmail author
  • Mitsuhiro Hattori
  • Yutaka Kawai
  • Nori Matsuda
  • Mitsugu Iwamoto
  • Kazuo Ohta
  • Yusuke Sakai
  • Tatsuji Munaka
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 9836)

Abstract

In searchable symmetric encryption (SSE), adding documents to a database is an indispensable functionality in real situations, and there are two approaches for executing the process: One approach is to update the encrypted index, and the other is to generate a new encrypted index. The former approach is called dynamic SSE, which has been extensively studied recently due to its importance. The latter approach has an advantage such that it can be directly applied to any existing SSE scheme without degrading its original functionalities, but previous methods are not satisfactory from a viewpoint of security, storage size, or efficiency. In this paper, we propose a simple document adding method that resolve the problem occurred in the latter approach. Our method is quite generic, and therefore can be applied to any existing SSE scheme (e.g. non-dynamic one with useful functionalities). Our key idea is to utilize publicly available information and hash chains in construction of encrypted indexes. In order to exhibit the ability of our method, we present a concrete scheme which is led by applying our method to the well-known and influential scheme SSE-2 (ACM CCS 2006). Thanks to the simplicity of our method, the scheme can be easily proved secure under a naturally generalized setting of the most widely used security model.

Keywords

Searchable symmetric encryption Document adding Generic approach Multiple encrypted indexes Generalized security model 

Notes

Acknowledgments

The authors would like to thank the anonymous reviewers for their valuable and helpful comments.

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Copyright information

© Springer International Publishing Switzerland 2016

Authors and Affiliations

  • Takato Hirano
    • 1
    Email author
  • Mitsuhiro Hattori
    • 1
  • Yutaka Kawai
    • 1
  • Nori Matsuda
    • 1
  • Mitsugu Iwamoto
    • 2
  • Kazuo Ohta
    • 2
  • Yusuke Sakai
    • 3
  • Tatsuji Munaka
    • 4
  1. 1.Mitsubishi Electric CorporationKamakuraJapan
  2. 2.University of Electro-CommunicationsChofuJapan
  3. 3.National Institute of Advanced Industrial Science and TechnologyTokyoJapan
  4. 4.Tokai UniversityTokyoJapan

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