An Efficient Scheme of Common Secure Indices for Conjunctive Keyword-Based Retrieval on Encrypted Data

  • Authors:
  • Peishun Wang;Huaxiong Wang;Josef Pieprzyk

  • Affiliations:
  • Center for Advanced Computing --- Algorithms and Cryptography, Department of Computing, Macquarie University, Australia NSW 2109;Center for Advanced Computing --- Algorithms and Cryptography, Department of Computing, Macquarie University, Australia NSW 2109 and Division of Mathematical Sciences, Nanyang Technological Univer ...;Center for Advanced Computing --- Algorithms and Cryptography, Department of Computing, Macquarie University, Australia NSW 2109

  • Venue:
  • Information Security Applications
  • Year:
  • 2009

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Abstract

We consider the following problem: members in a dynamic group retrieve their encrypted data from an untrusted server based on keywords and without any loss of data confidentiality and member's privacy. In this paper, we investigate common secure indices for conjunctive keyword-based retrieval over encrypted data, and construct an efficient scheme from Wang et al. dynamic accumulator, Nyberg combinatorial accumulator and Kiayias et al. public-key encryption system. The proposed scheme is trapdoorless and keyword-field free. The security is proved under the random oracle, decisional composite residuosity and extended strong RSA assumptions.