Paper 2021/1371

A Generic Construction of CCA-secure Attribute-based Encryption with Equality Test

Kyoichi Asano
Keita Emura
Atsushi Takayasu
Yohei Watanabe
Abstract

Attribute-based encryption with equality test (ABEET) is an extension of the ordinary attribute-based encryption (ABE), where trapdoors enable us to check whether two ciphertexts are encryptions of the same message. Thus far, several CCA-secure schemes have been proposed for monotone span programs satisfying selective security under -type assumptions. In this paper, we propose a generic construction of CCA-secure from delegatable . Specifically, our construction is an attribute-based extension of Lee et al.'s generic construction of identity-based encryption with equality test from hierarchical identity-based encryption. Even as far as we know, there are various delegatable schemes. Therefore, we obtain various schemes with new properties that have not been achieved before such as various predicates, adaptive security, standard assumptions, compact ciphertexts/secret keys, and lattice-based constructions. To obtain several pairing-based schemes, we explicitly describe how to transform a pair encoding scheme to be delegatable. Moreover, we propose the first pair encoding scheme for key-policy for non-monotone span programs with compact ciphertexts satisfying relaxed perfect security.

Note: Added a delegatable transformation of pair encoding and a new pair encoding scheme of key-policy ABE.

Metadata
Available format(s)
PDF
Category
Public-key cryptography
Publication info
Published elsewhere. Major revision. ProvSec 2022
Keywords
attribute-based encryptionequality testchosen-ciphertext securitygeneric construction
Contact author(s)
k asano @ uec ac jp
k-emura @ se kanazawa-u ac jp
takayasu-a @ g ecc u-tokyo ac jp
watanabe @ uec ac jp
History
2024-04-02: last of 2 revisions
2021-10-12: received
See all versions
Short URL
https://ia.cr/2021/1371
License
Creative Commons Attribution
CC BY

BibTeX

@misc{cryptoeprint:2021/1371,
      author = {Kyoichi Asano and Keita Emura and Atsushi Takayasu and Yohei Watanabe},
      title = {A Generic Construction of {CCA}-secure Attribute-based Encryption with Equality Test},
      howpublished = {Cryptology {ePrint} Archive, Paper 2021/1371},
      year = {2021},
      url = {https://eprint.iacr.org/2021/1371}
}
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