Paper 2016/749

Revocable Hierarchical Identity-Based Encryption with Adaptive Security

Kwangsu Lee

Abstract

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 groups and prove their adaptive security under simple static assumptions. To prove the adaptive security, we use the dual system encryption framework, but it is not simple to use the dual system encryption framework in RHIBE since the security model of RHIBE is quite different with that of HIBE. We show that it is possible to solve the problem of the RHIBE security proof by carefully designing hybrid games.

Metadata
Available format(s)
PDF
Category
Public-key cryptography
Publication info
Published elsewhere. Theoretical Computer Science
DOI
10.1016/j.tcs.2021.05.034
Keywords
Hierarchical identity-based encryptionKey revocationAdaptive securityDual system encryptionBilinear maps.
Contact author(s)
kwangsu @ sejong ac kr
History
2021-06-04: last of 2 revisions
2016-08-08: received
See all versions
Short URL
https://ia.cr/2016/749
License
Creative Commons Attribution
CC BY

BibTeX

@misc{cryptoeprint:2016/749,
      author = {Kwangsu Lee},
      title = {Revocable Hierarchical Identity-Based Encryption with Adaptive Security},
      howpublished = {Cryptology ePrint Archive, Paper 2016/749},
      year = {2016},
      doi = {10.1016/j.tcs.2021.05.034},
      note = {\url{https://eprint.iacr.org/2016/749}},
      url = {https://eprint.iacr.org/2016/749}
}
Note: In order to protect the privacy of readers, eprint.iacr.org does not use cookies or embedded third party content.