Revisit the Concept of PEKS: Problems and a Possible Solution

Qiang Tang

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    Abstract

    Since Boneh et al. propose the concept, non-interactive Public-key Encryption with Keyword Search (PEKS) has attracted lots of attention from cryptographers. Non-interactive PEKS enables a third party to test whether or not a tag, generated by the message sender, and a trapdoor, generated by the receiver, contain the same keyword without revealing further information. In this paper we investigate a non-interactive PEKS application proposed by Boneh et al. and show our observations, especially that privacy is not protected against a curious server. We propose the notion of interactive PEKS, which, in contrast to non-interactive PEKS, requires the tag to be generated interactively by the message sender and the receiver. For this new primitive, we identify two types of adversaries, namely a curious user and a curious server, and provide security formulations for the desirable properties. We propose a construction for interactive PEKS and prove its security in the proposed security model.
    Original languageUndefined
    Place of PublicationEnschede
    PublisherCentre for Telematics and Information Technology (CTIT)
    Number of pages17
    Publication statusPublished - 2008

    Publication series

    NameCTIT Technical Report Series
    PublisherUniversity of Twente, Centre for Telematics and Information Technology (CTIT)
    No.DTR08-9/TR-CTIT-08-54
    ISSN (Print)1381-3625

    Keywords

    • METIS-251146
    • IR-64938
    • SCS-Cybersecurity
    • EWI-13263

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