New constructions of revocable identity-based encryption from multilinear maps

Seunghwan Park, Kwangsu Lee, Dong Hoon Lee

    Research output: Contribution to journalArticlepeer-review

    36 Citations (Scopus)

    Abstract

    A revocable identity-based encryption (RIBE) provides an efficient revocation method in IBE that a trusted authority periodically broadcasts an update key for nonrevoked users and a user can decrypt a ciphertext if he is not revoked in the update key. Boldyreva, Goyal, and Kumar (CCS 2008) defined RIBE and proposed an RIBE scheme that uses a tree-based revocation encryption scheme to revoke users' private keys. In this paper, we devise a new technique for RIBE and propose RIBE schemes with a constant number of private key elements. We achieve the following results. We first devise a new technique for RIBE that combines a hierarchical IBE (HIBE) scheme and a public-key broadcast encryption (PKBE) scheme using multilinear maps. In contrast to the previous technique for RIBE, our technique uses a PKBE scheme in bilinear maps for revocation to achieve short private keys and update keys. Following our new technique for RIBE, we propose an RIBE scheme in three-leveled multilinear maps that combines the HIBE scheme of Boneh and Boyen (EUROCRYPT 2004) and the PKBE scheme of Boneh, Gentry, and Waters (CRYPTO 2005). The private key and update key of our scheme possess a constant number of group elements. Next, we propose another RIBE scheme with reduced public parameters and short keys by combining the HIBE scheme of Boneh and Boyen and the PKBE scheme of Boneh, Waters, and Zhandry (CRYPTO 2014), which uses multilinear maps. Compared with our first RIBE scheme, our second RIBE scheme requires high-leveled multilinear maps.

    Original languageEnglish
    Article number7078906
    Pages (from-to)1564-1577
    Number of pages14
    JournalIEEE Transactions on Information Forensics and Security
    Volume10
    Issue number8
    DOIs
    Publication statusPublished - 2015 Aug 1

    Keywords

    • broadcast encryption
    • Identity-based encryption
    • key revocation
    • multilinear maps

    ASJC Scopus subject areas

    • Computer Networks and Communications
    • Safety, Risk, Reliability and Quality

    Fingerprint

    Dive into the research topics of 'New constructions of revocable identity-based encryption from multilinear maps'. Together they form a unique fingerprint.

    Cite this