Paper 2014/994 Original: eprint.iacr.org/2014/994 ↗
Key-Policy Multi-authority Attribute-Based Encryption
Abstract
Bilinear groups are often used to create Attribute-Based Encryption (ABE) algorithms. In particular, they have been used to create an ABE system with multi authorities, but limited to the ciphertext-policy instance. Here, for the first time, we propose a multi-authority key-policy ABE system. In our proposal, the authorities may be set up in any moment and without any coordination. A party can simply act as an ABE authority by creating its own public parameters and issuing private keys to the users. A user can thus encrypt data choosing both a set of attributes and a set of trusted authorities, maintaining full control unless all his chosen authorities collude against him. We prove our system secure under the bilinear Diffie-Hellman assumption. The final publication is available at http://link.springer.com/chapter/10.1007%2F978-3-319-23021-4_14
Metadata
- Available format(s)
PDF- Publication info
- Preprint.
- History
- 2016-03-08: last updated
- 2014-12-18: published
- Short URL
- https://ia.cr/2014/994
- License
- https://creativecommons.org/licenses/by/4.0/
BibTeX
@misc{cryptoeprint:2014/994,
author = {Riccardo Longo and Chiara Marcolla and Massimiliano Sala},
title = {Key-Policy Multi-authority Attribute-Based Encryption},
howpublished = {Cryptology {ePrint} Archive, Paper 2014/994},
year = {2014},
url = {https://eprint.iacr.org/2014/994}
}