Paper 2023/922 Original: eprint.iacr.org/2023/922 ↗
mR$_{\text{LWE}}$-CP-ABE a revocable CP-ABE for Post-Quantum Cryptography
Abstract
We address the problem of user fast revocation in the lattice based CP-ABE by extending the scheme originally introduced in [A ciphertext policy attribute-based encryption scheme without pairings. J. Zhang, Z. Zhang - ICISC 2011]. While a lot of work exists on the construction of revocable schemes for CP-ABE based on pairings, works based on lattices are not so common, and – to the best of our knowledge – we introduce the first server-aided revocation scheme in a lattice based CP-ABE scheme, hence providing post-quantum safety. In particular, we rely on semi-trusted "mediators" to provide a multi-step decryption capable of handling mediation without re-encryption. We comment on the scheme and its application and we provide performance experiments on a prototype implementation in the ABE spin-off library of Palisade to evaluate the overhead compared with the original scheme.
Metadata
- Available format(s)
PDF- Category
- Public-key cryptography
- Publication info
- Preprint.
- History
- 2023-06-13: last updated
- 2023-06-13: published
- Short URL
- https://ia.cr/2023/922
- License
- https://creativecommons.org/licenses/by/4.0/
BibTeX
@misc{cryptoeprint:2023/922,
author = {Marco Cianfriglia and Elia Onofri and Marco Pedicini},
title = {mR$_{\text{LWE}}$-CP-ABE a revocable CP-ABE for Post-Quantum Cryptography},
howpublished = {Cryptology {ePrint} Archive, Paper 2023/922},
year = {2023},
url = {https://eprint.iacr.org/2023/922}
}