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An improved secure certificateless public-key searchable encryption scheme with multi-trapdoor privacy

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Abstract

In cloud, sensitive data is stored in an encrypted form, and searchable encryption is a technique which allows user to search over encrypted data by keyword and it leaks no useful information. However, the secure searchable encryption scheme which can prevent inside keyword guessing attacks (IKGA) and satisfy multi-trapdoor privacy has not been proposed. We first review the security of Wu et al.’s scheme and demonstrate that their scheme is insecure under IKGA and multi-keyword guessing attacks in this paper. To solve these issues, we propose an improved certificateless public key searchable encryption scheme. Furthermore, we give the proof of the security of our scheme under the computational bilinear Diffie-Hellman assumption. It shows that our scheme can resist IKGA successfully, and provides multi-ciphertext indistinguishability and multi-trapdoor privacy. The better performance is shown in our experiment.

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Correspondence to Lidong Han.

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Yang, G., Guo, J., Han, L. et al. An improved secure certificateless public-key searchable encryption scheme with multi-trapdoor privacy. Peer-to-Peer Netw. Appl. 15, 503–515 (2022). https://doi.org/10.1007/s12083-021-01253-9

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  • DOI: https://doi.org/10.1007/s12083-021-01253-9

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