Paper 2024/1779 Original: eprint.iacr.org/2024/1779 ↗
Secure Pairing-Free IBE and CP-ABE from Inner-Product Functional Encryption
Abstract
The potential of Attribute-Based Encryption (ABE) in the context of IoT has driven researchers to propose pairing-free ABE schemes that are suitable for resource-constrained devices. Unfortunately, many of these schemes turned out to be insecure. This fact seems to reinforce the point of view of some researchers according to which instantiating an Identity-Based Encryption (IBE) in plain Decisional Diffie-Hellman (DDH) groups is impossible. In this paper, we provide a generic Ciphertext-Policy ABE (CP-ABE) scheme with secret AND gate policy from Inner-Product Functional Encryption (IPFE). We also propose an instantiation of that generic CP-ABE scheme from the DDH assumption. From our generic CP-ABE scheme we derive an IBE scheme by introducing the concept of Clustered Identity-Based Encryption (CIBE). Our schemes show that it is possible to construct secure IBE and ABE schemes based on the classical DDH assumption. An implementation of our CIBE in Python using the Charm framework is available on GitHub.
Metadata
- Available format(s)
PDF- Category
- Public-key cryptography
- Publication info
- Preprint.
- History
- 2025-11-12: last updated
- 2024-10-31: published
- Short URL
- https://ia.cr/2024/1779
- License
- https://creativecommons.org/licenses/by/4.0/
BibTeX
@misc{cryptoeprint:2024/1779,
author = {Ahmad Khoureich Ka},
title = {Secure Pairing-Free IBE and CP-ABE from Inner-Product Functional Encryption},
howpublished = {Cryptology {ePrint} Archive, Paper 2024/1779},
year = {2024},
url = {https://eprint.iacr.org/2024/1779}
}