Revocable hierarchical identity-based broadcast encryption
نویسندگان
چکیده
منابع مشابه
Revocable Hierarchical Identity-Based Encryption from Multilinear Maps
In identity-based encryption (IBE) systems, an efficient key delegation method to manage a large number of users and an efficient key revocation method to handle the dynamic credentials of users are needed. Revocable hierarchical IBE (RHIBE) can provide these two methods by organizing the identities of users as a hierarchy and broadcasting an update key for non-revoked users per each time perio...
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Hierarchical identity-based encryption (HIBE) can be extended to revocable HIBE (RHIBE) if a private key of a user can be revoked when the private key is revealed or expired. Previously, many selectively secure RHIBE schemes were proposed, but it is still unsolved problem to construct an adaptively secure RHIBE scheme. In this work, we propose two RHIBE schemes in composite-order bilinear group...
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Identity-Based Encryption (IBE) offers an interesting alternative to PKI-enabled encryption as it eliminates the need for digital certificates. While revocation has been thoroughly studied in PKIs, few revocation mechanisms are known in the IBE setting. Until quite recently, the most convenient one was to augment identities with period numbers at encryption. All non-revoked receivers were thus ...
متن کاملRevocable Identity-Based Encryption from Lattices
In this paper, we present an identity-based encryption (IBE) scheme from lattices with efficient key revocation. We adopt multiple trapdoors from the Agrawal-Boneh-Boyen and GentryPeikerty-Vaikuntanathan lattice IBE schemes to realize key revocation, which in turn, makes use of binary-tree data structure. Using our scheme, key update requires logarithmic complexity in the maximal number of user...
متن کاملLattice-based Identity-Based Broadcast Encryption
Motivated by the lattice basis delegation technique due to [8], we propose an adaptively secure identity-based broadcast encryption(IBBE) scheme based on the hard worst-case lattice problems. Our construction can be generalized to a hierarchical IBBE (HIBBE) easily. Using the method in [1], we also modify our basic construction to obtain an IBBE in the standard model. To the best of the authors...
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ژورنال
عنوان ژورنال: Tsinghua Science and Technology
سال: 2018
ISSN: 1007-0214
DOI: 10.26599/tst.2018.9010023