Paper 2008/182
Restricted Adaptive Oblivious Transfer
Javier Herranz
Abstract
In this work we consider the following primitive, that we call {\it restricted adaptive oblivious transfer}. On the one hand, the owner of a database wants to restrict the access of users to this data according to some policy, in such a way that a user can only obtain information satisfying the restrictions imposed by the owner. On the other hand, a legitimate user wants to privately retrieve allowed parts of the data, in a sequential and adaptive way, without letting the owner know which part of the data is being obtained. After having formally described the components and required properties of a protocol for restricted adaptive oblivious transfer, we propose two generic ways to realize this primitive. The first one uses a cryptographic tool which has received a lot of attention from the literature in the last years: cryptosystems which are both multiplicatively and additively homomorphic. Our second generic construction is based on secret sharing schemes.
Note: Some updates and publication info
Metadata
- Available format(s)
-
PDF
- Category
- Cryptographic protocols
- Publication info
- Published elsewhere. Theoretical Computer Science, Vol. 412, pp. 6498–6506 (2011)
- Keywords
- Oblivious transferhomomorphic encryptionsecret sharing
- Contact author(s)
- jherranz @ ma4 upc edu
- History
- 2011-09-27: revised
- 2008-04-21: received
- See all versions
- Short URL
- https://ia.cr/2008/182
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2008/182,
author = {Javier Herranz},
title = {Restricted Adaptive Oblivious Transfer},
howpublished = {Cryptology {ePrint} Archive, Paper 2008/182},
year = {2008},
url = {https://eprint.iacr.org/2008/182}
}
