Paper 2017/038
CCA-Secure Inner-Product Functional Encryption from Projective Hash Functions
Fabrice Benhamouda, Florian Bourse, and Helger Lipmaa
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
- Published by the IACR in PKC 2017
- Keywords
- DCRDDHinner-product functional encryptionprojective hash functionsCCA-security
- Contact author(s)
-
fabrice benhamouda @ normalesup org
florian bourse @ ens fr
helger lipmaa @ gmail com - History
- 2017-01-15: received
- Short URL
- https://ia.cr/2017/038
- License
-
CC BY
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}
}
