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Paper: Fully Secure Anonymous HIBE and Secret-Key Anonymous IBE with Short Ciphertexts

Authors:
Angelo De Caro
Vincenzo Iovino
Giuseppe Persiano
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URL: http://eprint.iacr.org/2010/197
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Abstract: Lewko and Waters [Eurocrypt 2010] presented a fully secure HIBE with short ciphertexts. In this paper we show how to modify their construction to achieve anonymity. We prove the security of our scheme under static (and generically secure) assumptions formulated in composite order bilinear groups. In addition, we present a fully secure Anonymous IBE in the secret-key setting. Secret-Key Anonymous IBE was implied by the work of [Shen-Shi-Waters - TCC 2009] which can be shown secure in the selective-id model. No previous fully secure construction of secret-key Anonymous IBE is known.
BibTeX
@misc{eprint-2010-23098,
  title={Fully Secure Anonymous HIBE and Secret-Key Anonymous IBE with Short Ciphertexts},
  booktitle={IACR Eprint archive},
  keywords={IBE, Hierarchical IBE, full security, key privacy and anonymity},
  url={http://eprint.iacr.org/2010/197},
  note={ decaro@dia.unisa.it 14831 received 8 Apr 2010, last revised 10 Aug 2010},
  author={Angelo De Caro and Vincenzo Iovino and Giuseppe Persiano},
  year=2010
}