Optimizing Attribute-Based Encryption for Circuits Using Compartmented Access Structures

Alexandru Ioniţă, Alexandru Ioniţă

2023

Abstract

Attribute-based encryption (ABE) is an asymmetric encryption method that allows expressive access granting mechanisms, with high applicability in modern IT infrastructure, such as Cloud or IoT systems. (Ezhilarasi et al., 2021; Touati and Challal, 2016) One open problem regarding ABE is using Boolean circuits as access structures. While Boolean Formulae were supported since the first ABE scheme proposed, there is still no efficient construction that supports Boolean circuits. We propose a new ABE scheme for a new access structure type, situated between Boolean formulae and Boolean circuits in terms of expressiveness. This key point in our construction is the usage of CAS-nodes, a structure modeling compartmented groups access structures. We also show that our CAS-nodes can be used to improve the efficiency of existing ABE schemes for Boolean circuits. Our construction is secure in the Selective Set Model under the bilinear Decisional Diffie-Hellman Assumption.

Paper Citation

in Harvard Style

Ioniţă A. (2023). Optimizing Attribute-Based Encryption for Circuits Using Compartmented Access Structures. In Proceedings of the 20th International Conference on Security and Cryptography - Volume 1: SECRYPT; ISBN 978-989-758-666-8, SciTePress, pages 230-241. DOI: 10.5220/0012139000003555

in Bibtex Style

@conference{secrypt23,
author={Alexandru Ioniţă},
title={Optimizing Attribute-Based Encryption for Circuits Using Compartmented Access Structures},
booktitle={Proceedings of the 20th International Conference on Security and Cryptography - Volume 1: SECRYPT},
year={2023},
pages={230-241},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0012139000003555},
isbn={978-989-758-666-8},
}

in EndNote Style

TY - CONF

JO - Proceedings of the 20th International Conference on Security and Cryptography - Volume 1: SECRYPT
TI - Optimizing Attribute-Based Encryption for Circuits Using Compartmented Access Structures
SN - 978-989-758-666-8
AU - Ioniţă A.
PY - 2023
SP - 230
EP - 241
DO - 10.5220/0012139000003555
PB - SciTePress