Paper 2024/1779
Ciphertext-Policy ABE from Inner-Product FE
, Université Alioune Diop de Bambey, SenegalAbstract
The enormous 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 authors according to which instantiating an Identity-Based Encryption (IBE) in plain Decision Diffie-Hellman (DDH) groups is impossible. In this paper, we provide a generic AND gate access structured Ciphertext-Policy ABE (CP-ABE) scheme with secret access 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 indeed possible to construct practical and secure IBE and ABE schemes based on the classical DDH assumption.
Metadata
- Available format(s)
-
PDF
- Category
- Public-key cryptography
- Publication info
- Preprint.
- Keywords
- Identity-Based EncryptionAttribute-Based EncryptionInner- Product Functional EncryptionDecision Diffie-Hellman.
- Contact author(s)
- ahmadkhoureich ka @ uadb edu sn
- History
- 2024-11-05: revised
- 2024-10-31: received
- See all versions
- Short URL
- https://ia.cr/2024/1779
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2024/1779,
author = {Ahmad Khoureich Ka},
title = {Ciphertext-Policy {ABE} from Inner-Product {FE}},
howpublished = {Cryptology {ePrint} Archive, Paper 2024/1779},
year = {2024},
url = {https://eprint.iacr.org/2024/1779}
}
