Efficient semantic-based multiuser search scheme

CAO Laicheng; WU Qirui; WANG Yafei; WU Rong; GUO Xian

doi:10.16511/j.cnki.qhdxxb.2020.22.45

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Journal of Tsinghua University(Science and Technology) ›› 2021, Vol. 61 ›› Issue (11) : 1228-1233. DOI: 10.16511/j.cnki.qhdxxb.2020.22.45

VULNERABILITY ANALUSIS AND RISK ASSESSMENT

Efficient semantic-based multiuser search scheme

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Abstract

Current cloud storage searchable encryption schemes have mostly been developed for multiuser environments with multi-keyword searches, but research on these schemes have not considered the influence of the semantics on the search results. This paper presents an efficient semantic-based multiuser search scheme using two cloud servers to ensure efficient searches. One cloud server matches the trapdoor and generates results that match the semantics while the other searches for the most relevant files and returns them to the user. This coordination reduces the server load by sending the semantic tree search to the cloud server which uses the trapdoor strategy. The semantic tree is encrypted to ensure the key information security. Tests show that this scheme is effective, resists the collusion attack, provides semantic privacy, and is more efficient than current related schemes.

Key words

searchable encryption / semantic tree / multiuser / cloud storage

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CAO Laicheng, WU Qirui, WANG Yafei, WU Rong, GUO Xian. Efficient semantic-based multiuser search scheme[J]. Journal of Tsinghua University(Science and Technology). 2021, 61(11): 1228-1233 https://doi.org/10.16511/j.cnki.qhdxxb.2020.22.45

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