A unidirectional conditional proxy re-encryption scheme based on non-monotonic access structure

Bin Wang

Paper 2012/641

A unidirectional conditional proxy re-encryption scheme based on non-monotonic access structure

Bin Wang

Abstract

Recently, Fang et al. [6] introduced an interactive(bidirectional) conditional proxy re-encryption(C-PRE) scheme such that a proxy can only convert ciphertexts that satisfy access policy set by a delegator. Their scheme supports monotonic access policy expressed by “OR” and “AND” gates. In addition, their scheme is called interactive since generation of re-encryption keys requires interaction between the delegator and delegatee. In this paper, we study the problem of constructing a unidirectional(non-interactive) C-PRE scheme supporting non-monotonic access policy expressed by “NOT”, “OR” and “AND” gates. A security model for unidirectional C-PRE schemes is also proposed in this paper. To yield a unidirectional C-PRE scheme supporting non-monotonic access policy, we extend the unidirectional PRE scheme presented by Libert et al. [8] by using the ideas from the non-monotonic attributed based encryption (ABE) scheme presented by Ostrovsky et al. [9]. Furthermore, the security of our C-PRE scheme is proved under the modified 3-weak Decision Bilinear Diffie-Hellman Inversion assumption in the standard model.

Metadata

Available format(s): PDF
Category: Public-key cryptography
Publication info: Published elsewhere. Unknown where it was published
Contact author(s): jxbin76 @ yahoo cn
History: 2012-11-11: received
Short URL: https://ia.cr/2012/641
License: CC BY

BibTeX

@misc{cryptoeprint:2012/641,
      author = {Bin Wang},
      title = {A unidirectional conditional proxy re-encryption scheme based on non-monotonic access structure},
      howpublished = {Cryptology {ePrint} Archive, Paper 2012/641},
      year = {2012},
      url = {https://eprint.iacr.org/2012/641}
}