New Identity Based Encryption And Its Proxy Re-encryption

Xu An Wang; Xiaoyuan Yang

Paper 2012/250 Original: eprint.iacr.org/2012/250 ↗

New Identity Based Encryption And Its Proxy Re-encryption

Xu An Wang

Xiaoyuan Yang

Abstract

Identity based encryption (IBE) has received great attention since Boneh and Franklin's breakthrough work on bilinear group based IBE [4]. Till now, many IBE schemes relying on bilinear groups with diff erent properties have been proposed [5, 25, 29, 14]. However, one part of the user's private key in all these IBE schemes is constructed as y = f(msk), where msk is the master key and y is an element in the underlying bilinear group G. In this paper, we propose a new IBE: one part of the private key is y = f(msk), where msk is the master key and y is an element in Z_p . Here p is the underlying bilinear group's prime order. By using some novel techniques, we prove this new IBE is semantic secure under the selective identity chosen plaintext attacks (IND-sID-CPA) in the standard model. Based on this IBE scheme, we construct an IND-ID-CCA secure identity based proxy re-encryption (IBPRE) scheme which is master secret secure and efficient for the proxy compared with other IND-ID-CCA (IBPRE) schemes.

Metadata

Available format(s): PDF
Category: Public-key cryptography
Publication info: Preprint.
History: 2012-05-03: last updated; 2012-05-03: published
Short URL: https://ia.cr/2012/250
License: https://creativecommons.org/licenses/by/4.0/

BibTeX

@misc{cryptoeprint:2012/250,
      author = {Xu An Wang and Xiaoyuan Yang},
      title = {New Identity Based Encryption And Its Proxy Re-encryption},
      howpublished = {Cryptology {ePrint} Archive, Paper 2012/250},
      year = {2012},
      url = {https://eprint.iacr.org/2012/250}
}