Release time:2025-03-31

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DOI number:10.1007/978-981-99-8733-7

Journal:Advances in Cryptology - ASIACRYPT 2023 - 29th International Conference on the Theory and Application of Cryptology and Information Security, Guangzhou, China, December 4-8, 2023, Proceedings, Part V

Place of Publication:Guangzhou, China

Key Words:Attribute-Based Encryption, Decentralized, Fully Adaptive Security

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.

Co-author:Qiaohan Chu, Ying Gao, Jianting Ning,Luping Wang

First Author:Jie Chen

Indexed by:会议论文

Correspondence Author:Qiaohan Chu

Page Number:3-32

ISSN No.:978-981-99-8720-7

Translation or Not:no

Date of Publication:2023-12-18