International Association for Cryptologic Research

International Association
for Cryptologic Research

CryptoDB

Improved Fully Adaptive Decentralized MA-ABE for NC1 from MDDH

Authors:
Jie Chen , East China Normal University, China
Qiaohan Chu , East China Normal University, China
Ying Gao , Beihang University, China
Jianting Ning , Fujian Normal University, China
Luping Wang , Suzhou University of Science and Technology, China
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Presentation: Slides
Conference: ASIACRYPT 2023
Abstract: We improve the first and the only existing prime-order fully adaptively secure decentralized Multi-Authority Attribute-Based Encryption (MA-ABE) scheme for NC1 in Datta-Komargodski-Waters [Eurocrypt '23]. Compared with Datta-Komargodski-Waters, our decentralized MA-ABE scheme extra enjoys shorter parameters and meanwhile supports many-use of attribute. Shorter parameters is always the goal for Attribute-Based Encryption (ABE), and many-use of attribute is a native property of decentralized MA-ABE for NC1. Our scheme relies on the Matrix Decision Diffie-Hellman (MDDH) assumption and is in the random oracle model, as Datta-Komargodski-Waters.
BibTeX
@inproceedings{asiacrypt-2023-33461,
  title={Improved Fully Adaptive Decentralized MA-ABE for NC1 from MDDH},
  publisher={Springer-Verlag},
  author={Jie Chen and Qiaohan Chu and Ying Gao and Jianting Ning and Luping Wang},
  year=2023
}