Towards Public Verifiable and Forward-Privacy Encrypted Search by Using Blockchain

Dynamic Searchable Symmetric Encryption (DSSE) is a practical cryptographic primitive that assists servers to provide search and update functionalities in the ciphertext domain. Recent work on DSSE schemes has focused on the direction of forward-privacy, requiring that newly added files cannot be linked to previously query results. However, due to the complexity of forward-privacy updates, existing schemes can only address an honest-but-curious server. It is difficult to verify updated results while preserving forward-privacy. In this paper, we explore how blockchain techniques can help us achieve a verifiable and forward-privacy DSSE scheme. Our scheme resorts to the emerging smart contract as a trusted…

• NN
  National Natural Science Foundation of China

  Awards: 61572412, 62102035
• RG
  Research Grants Council, University Grants Committee

  Awards: RFS2122-1S04, CityU 11202419, CityU 11217819, R6021-20F, CityU 11217620, CityU 11218521, N_CityU139/21
• FR
  Fundamental Research Funds for the Central Universities

  Award: 2020NTST32