Lattice-based certificateless public-key encryption in the standard model

Reza Sepahi, Ron Steinfeld, Josef Pieprzyk

Research output: Contribution to journalArticleResearchpeer-review

12 Citations (Scopus)


The notion of certificateless public-key encryption (CL-PKE) was introduced by Al-Riyami and Paterson in 2003 that avoids the drawbacks of both traditional PKI-based public-key encryption (i.e., establishing public-key infrastructure) and identity-based encryption (i.e., key escrow). So CL-PKE like identity-based encryption is certificate-free, and unlike identity-based encryption is key escrow-free. In this paper, we introduce simple and efficient CCA-secure CL-PKE based on (hierarchical) identity-based encryption. Our construction has both theoretical and practical interests. First, our generic transformation gives a new way of constructing CCA-secure CL-PKE. Second, instantiating our transformation using lattice-based primitives results in a more efficient CCA-secure CL-PKE than its counterpart introduced by Dent in 2008.
Original languageEnglish
Pages (from-to)315-333
Number of pages19
JournalInternational Journal of Information Security
Issue number4
Publication statusPublished - 2014
Externally publishedYes

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