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Paper: On the Security of a Bidirectional Proxy Re-Encryption Scheme from PKC 2010

Authors:
Jian Weng
Yunlei Zhao
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URL: http://eprint.iacr.org/2010/319
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Abstract: In PKC 2010, Matsuda, Nishimaki and Tanaka proposed a bidirectional proxy re-encryption (PRE) scheme without bilinear maps, and claimed that their scheme is chosen-ciphertext secure in the standard model. However, by giving a concrete attack, in this paper we indicate that their PRE scheme fails to achieve the chosen-ciphertext security. The purpose of this paper is to clarify the fact that, it is still an open problem to come up with a chosen-ciphertext secure PRE scheme without bilinear maps in the standard model.
BibTeX
@misc{eprint-2010-23220,
  title={On the Security of a Bidirectional Proxy Re-Encryption Scheme from PKC 2010},
  booktitle={IACR Eprint archive},
  keywords={public-key cryptography / public-key cryptography},
  url={http://eprint.iacr.org/2010/319},
  note={ cryptjweng@gmail.com 14759 received 27 May 2010, last revised 30 May 2010},
  author={Jian Weng and Yunlei Zhao},
  year=2010
}