One privacy-preserving multi-keyword ranked search scheme revisited
by Zhengjun Cao; Xiqi Wang; Lihua Liu
International Journal of Information and Computer Security (IJICS), Vol. 16, No. 3/4, 2021

Abstract: Searchable encryption is a useful tool which allows a user to securely search over encrypted data through keywords and retrieve documents of interest. It plays a key role in big data and outsourcing computation scenarios. In this paper, we show that the privacy-preserving multi-keyword ranked search scheme over encrypted cloud data (Cao et al., 2014) is flawed, because the introduced similarity scores do not represent the true similarities between indexing vectors and a querying vector. The returned documents by cloud server could be irrelevant to the queried keyword. We also present a revision based on the technique introduced by Wong et al. (2009).

Online publication date: Mon, 15-Nov-2021

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