Paper 2017/038 Original: eprint.iacr.org/2017/038 ↗
CCA-Secure Inner-Product Functional Encryption from Projective Hash Functions
Abstract
In an inner-product functional encryption scheme, the plaintexts are vectors and the owner of the secret key can delegate the ability to compute weighted sums of the coefficients of the plaintext of any ciphertext. Recently, many inner-product functional encryption schemes were proposed. However, none of the known schemes are secure against chosen ciphertext attacks (IND-FE-CCA). We present a generic construction of IND-FE-CCA inner-product functional encryption from projective hash functions with homomorphic properties. We show concrete instantiations based on the DCR assumption, the DDH assumption, and more generally, any Matrix DDH assumption.
Metadata
- Available format(s)
PDF- Category
- Public-key cryptography
- Publication info
- Preprint.
- History
- 2017-01-15: last updated
- 2017-01-15: published
- Short URL
- https://ia.cr/2017/038
- License
- https://creativecommons.org/licenses/by/4.0/
BibTeX
@misc{cryptoeprint:2017/038,
author = {Fabrice Benhamouda and Florian Bourse and Helger Lipmaa},
title = {CCA-Secure Inner-Product Functional Encryption from Projective Hash Functions},
howpublished = {Cryptology {ePrint} Archive, Paper 2017/038},
year = {2017},
url = {https://eprint.iacr.org/2017/038}
}