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

Anass Sbai, Cyril Drocourt, Gilles Dequen

2020

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.

Paper Citation

in Harvard Style

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 - Volume 1: ICISSP, ISBN 978-989-758-399-5, pages 440-447. DOI: 10.5220/0008955704400447

in Bibtex Style

@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 - Volume 1: ICISSP,},
year={2020},
pages={440-447},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0008955704400447},
isbn={978-989-758-399-5},
}

in EndNote Style

TY - CONF

JO - Proceedings of the 6th International Conference on Information Systems Security and Privacy - Volume 1: ICISSP,
TI - CCA Secure Unidirectional PRE with Key Pair in the Standard Model without Pairings
SN - 978-989-758-399-5
AU - Sbai A.
AU - Drocourt C.
AU - Dequen G.
PY - 2020
SP - 440
EP - 447
DO - 10.5220/0008955704400447