Paper 2014/994

Key-Policy Multi-authority Attribute-Based Encryption

Riccardo Longo, Chiara Marcolla, and Massimiliano Sala

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

Note: Updated paper to the published version.

Metadata
Available format(s)
PDF
Publication info
Published elsewhere. Major revision. Lecture Notes in Computer Science
DOI
10.1007/978-3-319-23021-4_14
Keywords
ABEBilinear groupsAlgebraic cryptography
Contact author(s)
riccardolongomath @ gmail com
History
2016-03-08: revised
2014-12-18: received
See all versions
Short URL
https://ia.cr/2014/994
License
Creative Commons Attribution
CC BY

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},
      doi = {10.1007/978-3-319-23021-4_14},
      note = {\url{https://eprint.iacr.org/2014/994}},
      url = {https://eprint.iacr.org/2014/994}
}
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