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Towards efficient verifiable multi-keyword search over encrypted data based on blockchain.

Wanshan Xu1,2, Jianbiao Zhang1,2, Yilin Yuan1,2

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Summary
This summary is machine-generated.

This study introduces a novel multi-keyword verifiable searchable symmetric encryption scheme using blockchain for secure data searching. It ensures efficient searches and fair verification, enhancing data security on untrusted servers.

Keywords:
BlockchainMulti-keyword searchResult verificationSymmetric searchable encryption

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Area of Science:

  • Computer Science
  • Cryptography
  • Information Security

Background:

  • Searchable symmetric encryption (SSE) enables searching encrypted data on untrusted servers.
  • Existing SSE schemes often lack fair verification or multi-keyword support.
  • Verifying search results is crucial when servers are untrusted.

Purpose of the Study:

  • To design an efficient multi-keyword verifiable searchable symmetric encryption (MV-SSE) scheme.
  • To provide fair verification of search results from untrusted servers.
  • To enhance the security and efficiency of searching encrypted data.

Main Methods:

  • Utilized blockchain for fair verification of search results.
  • Employed bitmap for efficient multi-keyword search indexing.
  • Combined bitmap and hash functions for lightweight verification.
  • Implemented dynamic file updates with forward security.

Main Results:

  • Achieved efficient multi-keyword search and fair result verification.
  • Reduced verification time compared to public-key cryptography schemes.
  • Demonstrated practical efficiency and viability through experimental analysis.
  • Scheme proven secure against Chosen-Keyword Attacks (CKA).

Conclusions:

  • The proposed MV-SSE scheme offers an efficient and secure solution for searching encrypted data.
  • Blockchain integration ensures fairness and integrity in result verification.
  • The scheme effectively addresses limitations of existing SSE approaches, particularly for multi-keyword searches.