Citation: | Xueyan LIU, Tingting LU, Xiaotao YANG. Verifiable Attribute-based Keyword Search Scheme with Privacy Preservation[J]. Journal of Electronics & Information Technology, 2021, 43(1): 218-225. doi: 10.11999/JEIT190817 |
To address the problems of the leakage of access structure, high computation of user side and lack of integrity verification in current Attribute-Based Keyword Search (ABKS) scheme, a verifiable attribute-based keyword search scheme with privacy preservation is proposed. The scheme adopts the ordered multi-valued attribute access structure and ordered multi-valued attribute set, and fixes the position of each attribute to reduce the parameters and related computation cost and to improve the efficiency of the scheme, while in key generation, the Hash values of specific attributes are calculated to distinguish the different values of multi-valued attributes. At the same time, Hash and pair operation are used to hide the access structure and prevent the disclosure of the access structure. The inverted index structure and Merkle tree are used to establish the data authentication tree, which can verify the correctness of the document returned by the cloud server provider and the result of outsourced decryption. In addition, outsourced decryption is used to reduce the computation cost on the user side. Finally, formal proofs and experimental results show that the scheme achieve verifiability of shared data in the cloud, keyword undistinguishable and keyword unlinkable, and is efficient.
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