Paper 2022/1246
Identity-Based Matchmaking Encryption from Standard Assumptions
, East China Normal University, East China Normal University, Jinan University, Jinan UniversityAbstract
In this work, we propose the first identity-based matchmaking encryption (IB-ME) scheme under the standard assumptions in the standard model. This scheme is proven to be secure under the symmetric external Diffie-Hellman (SXDH) assumption in prime order bilinear pairing groups. In our IB-ME scheme, all parameters have constant number of group elements and are simpler than those of previous constructions. Previous works are either in the random oracle model or based on the q-type assumptions, while ours is built directly in the standard model and based on static assumptions, and does not rely on other crypto tools. More concretely, our IB-ME is constructed from a variant of two-level anonymous IBE. We observed that this two-level IBE with anonymity and unforgeability satisfies the same functionality of IB-ME, and its security properties cleverly meet the two requirements of IB-ME (Privacy and Authenticity). The privacy property of IB-ME relies on the anonymity of this two-level IBE, while the authenticity property is corresponding to the unforgeability in the 2nd level. This variant of two-level IBE is built from dual pairing vector spaces, and both security reductions rely on dual system encryption.
Metadata
- Available format(s)
-
PDF
- Category
- Public-key cryptography
- Publication info
- Published by the IACR in ASIACRYPT 2022
- Keywords
- Matchmaking encryption Identity-based encryption Standard assumptions Standard model
- Contact author(s)
-
s080001 @ e ntu edu sg
yli @ stu ecnu edu cn
jinming wen @ mail mcgill ca
cryptjweng @ gmail com - History
- 2022-09-23: approved
- 2022-09-19: received
- See all versions
- Short URL
- https://ia.cr/2022/1246
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2022/1246,
author = {Jie Chen and Yu Li and Jinming Wen and Jian Weng},
title = {Identity-Based Matchmaking Encryption from Standard Assumptions},
howpublished = {Cryptology ePrint Archive, Paper 2022/1246},
year = {2022},
note = {\url{https://eprint.iacr.org/2022/1246}},
url = {https://eprint.iacr.org/2022/1246}
}
