Efficient Conjunctive Keywords Search over Encrypted E-Mail Data in Public Key Setting

Efficient Conjunctive Keywords Search over Encrypted E-Mail Data in Public Key Setting

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Searchable public key encryption supporting conjunctive keywords search (SPE-CKS) enables data users to retrieve the encrypted data of interest from an untrusted server.Based on SPE-CKS, one read more can realize a multi-keywords search over the encrypted e-mails.In this paper, we propose an efficient SPE-CKS scheme by utilizing a keyword conversion method and the bilinear map technique.

Our scheme is proven to be secure against chosen keyword attack under a standard security definition and can also withstand the keywords guessing attack.Furthermore, we design an experiment over a real world e-mail dataset to illustrate that our scheme has a better performance on time and space complexities than the sawgrass virtuoso sg500 complete sublijet sublimation printer kit previous schemes.A detailed analysis shows that our scheme is very practical for the encrypted e-mail system in the mobile cloud environment.