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Identity-Based Matchmaking Encryption from Standard Assumptions

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Advances in Cryptology – ASIACRYPT 2022 (ASIACRYPT 2022)

Part of the book series: Lecture Notes in Computer Science ((LNCS,volume 13793))

Abstract

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 scheme 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.

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Acknowledgements

We are extremely grateful to the editors and anonymous reviewers for their insightful and constructive comments on this work. Jie Chen is supported by National Natural Science Foundation of China (61972156), NSFC-ISF Joint Scientific Research Program (61961146004), National Key Research and Development Program of China (2018YFA0704701) and Innovation Program of Shanghai Municipal Education Commission (2021-01-07-00-08-E00101). Jinming Wen is partially supported by National Natural Science Foundation of China (No.11871248), Guangdong Major Project of Basic and Applied Basic Research (2019B030302008), and Natural Science Foundation of Guangdong Province of China (2021A515010857, 2022A1515010029). Jian Weng is supported by Major Program of Guangdong Basic and Applied Research Project under Grant No.2019B030302008, National Natural Science Foundation of China under Grant No.61825203, Guangdong Provincial Science and Technology Project under Grant No.2021A0505030033, National Joint Engineering Research Center of Network Security Detection and Protection Technology, and Guangdong Key Laboratory of Data Security and Privacy Preserving.

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Authors and Affiliations

  1. Shanghai Key Laboratory of Trustworthy Computing, Software Engineering Institute, East China Normal University, Shanghai, 200062, China

    Jie Chen & Yu Li

  2. College of Information Science and Technology and the College of Cyber Security, Jinan University, Guangzhou, 510632, China

    Jinming Wen & Jian Weng

  3. State Key Laboratory of Cryptology, P.O. Box 5159, Beijing, 100878, China

    Jinming Wen

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  1. Jie Chen
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  2. Yu Li
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Correspondence to Jie Chen .

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Editors and Affiliations

  1. Indian Institute of Technology Madras, Chennai, India

    Shweta Agrawal

  2. Chinese Academy of Sciences, Beijing, China

    Dongdai Lin

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Chen, J., Li, Y., Wen, J., Weng, J. (2022). Identity-Based Matchmaking Encryption from Standard Assumptions. In: Agrawal, S., Lin, D. (eds) Advances in Cryptology – ASIACRYPT 2022. ASIACRYPT 2022. Lecture Notes in Computer Science, vol 13793. Springer, Cham. https://doi.org/10.1007/978-3-031-22969-5_14

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  • DOI: https://doi.org/10.1007/978-3-031-22969-5_14

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