A Note on ``Privacy-Preserving Multi-Keyword Searchable Encryption for Distributed Systems''

ePrint Report: A Note on ``Privacy-Preserving Multi-Keyword Searchable Encryption for Distributed Systems''

Zhengjun Cao, Lihua Liu

We show that the searchable encryption scheme [IEEE Trans. Parallel Distrib. Syst., 32 (3), 2021, 561--574] cannot work because the Data Provider's secret key $sk_{DP}$ and the Request User's secret key $sk_{RU}$ are not available to the Cloud Platform (CP) or the Internal Server (IS). The CP and IS cannot finish the secure bit-decomposition protocol, which requires CP or IS to decrypt the blinded …

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