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Identity-Based Proxy Re-encryption

Authors:
Matthew Green
Giuseppe Ateniese
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URL: http://eprint.iacr.org/2006/473
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Abstract: In a proxy re-encryption scheme a semi-trusted proxy converts a ciphertext for Alice into a ciphertext for Bob {\em without} seeing the underlying plaintext. A number of solutions have been proposed in the public-key setting. In this paper, we address the problem of Identity-Based proxy re-encryption, where ciphertexts are transformed from one {\it identity} to another. Our schemes are compatible with current IBE deployments and do not require any extra work from the IBE trusted-party key generator. In addition, they are non-interactive and one of them permits multiple re-encryptions. Their security is based on a standard assumption (DBDH) in the random oracle model.
BibTeX
@misc{eprint-2006-21964,
  title={Identity-Based Proxy Re-encryption},
  booktitle={IACR Eprint archive},
  keywords={public-key cryptography / proxy re-encryption, identity-based encryption, bilinear maps},
  url={http://eprint.iacr.org/2006/473},
  note={ mgreen@cs.jhu.edu 13498 received 15 Dec 2006},
  author={Matthew Green and Giuseppe Ateniese},
  year=2006
}