CCA Secure Unidirectional PRE with Key Pair in the Standard Model without Pairings

Anass Sbai; Cyril Drocourt; Gilles Dequen

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Paper

CCA Secure Unidirectional PRE with Key Pair in the Standard Model without Pairings

Topics: Cryptographic Algorithms

In Proceedings of the 6th International Conference on Information Systems Security and Privacy ICISSP - Volume 1, 440-447, 2020 , Valletta, Malta

Authors: Anass Sbai ; Cyril Drocourt and Gilles Dequen

Affiliation: MIS Laboratory, University of Picardie Jules Verne, France

Keyword(s): Proxy Re-Encryption, Unidirectional, Chosen Ciphertext Attack, Cramer-Shoup, Standard Model.

Abstract: Secure Data sharing has become an ubiquitous need. One way of pursuing it is to use Proxy Re-Encryption (PRE), which allows delegation of decryption rights selectively. This work tackles the problem of designing a Proxy Re-Encryption that is unidirectional and CCA-secure in the standard model without pairings. In (Zhang et al., 2013) they propose a solution that makes the Cramer-Shoup encryption scheme publicly verifiable and use their result to construct a CCA secure PRE in the standard model. However, we show that their scheme is vulnerable against adaptive chosen ciphertexts attacks. Then we propose a new construction based on Cramer-Shoup crypto-system (Cramer and Shoup, 1998), that is CCA secure without pairings nor random oracle.

CC BY-NC-ND 4.0

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Paper citation in several formats:

Sbai, A.; Drocourt, C. and Dequen, G. (2020). CCA Secure Unidirectional PRE with Key Pair in the Standard Model without Pairings. In Proceedings of the 6th International Conference on Information Systems Security and Privacy - ICISSP; ISBN 978-989-758-399-5; ISSN 2184-4356, SciTePress, pages 440-447. DOI: 10.5220/0008955704400447

@conference{icissp20,
author={Anass Sbai. and Cyril Drocourt. and Gilles Dequen.},
title={CCA Secure Unidirectional PRE with Key Pair in the Standard Model without Pairings},
booktitle={Proceedings of the 6th International Conference on Information Systems Security and Privacy - ICISSP},
year={2020},
pages={440-447},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0008955704400447},
isbn={978-989-758-399-5},
issn={2184-4356},
}

TY - CONF

JO - Proceedings of the 6th International Conference on Information Systems Security and Privacy - ICISSP
TI - CCA Secure Unidirectional PRE with Key Pair in the Standard Model without Pairings
SN - 978-989-758-399-5
IS - 2184-4356
AU - Sbai, A.
AU - Drocourt, C.
AU - Dequen, G.
PY - 2020
SP - 440
EP - 447
DO - 10.5220/0008955704400447
PB - SciTePress