A Novel Pairing-Free ECC-Based Ciphertext-Policy Attribute-Based Proxy Re-Encryption for Secure Cloud Storage

Shivangi Shukla, Sankita Patel

2025

Abstract

Proxy re-encryption (PRE) is a cryptographic primitive enabling data owner to delegate ciphertext access rights without leaking underlying plaintext to honest-but-curious cloud servers. The delegation of ciphertext access rights enhances the efficiency of outsourced data on cloud servers. Ciphertext-policy attribute-based proxy re-encryption (CP-ABPRE) employs PRE in attribute-based encryption to enable ciphertext transformation from specified access policy to new access policy without leaking underlying plaintext. However, current state-of-the-art schemes incorporate expensive bilinear pairing operations to transform ciphertext access policy. The escalating adoption of cloud computing in real-time applications demands a pairing-free CP-ABPRE mechanism for resource-limited users in the network. The agenda of this paper, for the first time, is to design a novel pairing-free elliptic curve cryptography (ECC) based ciphertext-policy attribute-based proxy re-encryption, abbreviated as ECC-CP-ABPRE scheme. It incorporates linear secret sharing scheme (LSSS) for the expressiveness of access policies. To reduce overall communication and computational overheads, ECC-CP-ABPRE scheme replaces expensive bilinear pairing operations with scalar multiplication on elliptic curve. The security analysis illustrates that ECC-CP-ABPRE scheme is secure under collusion attack and ensures data confidentiality. Furthermore, the performance evaluation demonstrates that ECC-CP-ABPRE scheme incurs significant reduction in computational and communication overheads than existing CP-ABPRE schemes.

Paper Citation

in Harvard Style

Shukla S. and Patel S. (2025). A Novel Pairing-Free ECC-Based Ciphertext-Policy Attribute-Based Proxy Re-Encryption for Secure Cloud Storage. In Proceedings of the 11th International Conference on Information Systems Security and Privacy - Volume 1: ICISSP; ISBN 978-989-758-735-1, SciTePress, pages 225-233. DOI: 10.5220/0013138600003899

in Bibtex Style

@conference{icissp25,
author={Shivangi Shukla and Sankita Patel},
title={A Novel Pairing-Free ECC-Based Ciphertext-Policy Attribute-Based Proxy Re-Encryption for Secure Cloud Storage},
booktitle={Proceedings of the 11th International Conference on Information Systems Security and Privacy - Volume 1: ICISSP},
year={2025},
pages={225-233},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0013138600003899},
isbn={978-989-758-735-1},
}

in EndNote Style

TY - CONF

JO - Proceedings of the 11th International Conference on Information Systems Security and Privacy - Volume 1: ICISSP
TI - A Novel Pairing-Free ECC-Based Ciphertext-Policy Attribute-Based Proxy Re-Encryption for Secure Cloud Storage
SN - 978-989-758-735-1
AU - Shukla S.
AU - Patel S.
PY - 2025
SP - 225
EP - 233
DO - 10.5220/0013138600003899
PB - SciTePress