Paper 2010/197

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

Angelo De Caro, Vincenzo Iovino, and Giuseppe Persiano


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.

Note: Extended version of the Pairing 2010 paper.

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Publication info
Published elsewhere. Pairing 2010
IBEHierarchical IBEfull securitykey privacy and anonymity.
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decaro @ dia unisa it
2010-10-28: last of 4 revisions
2010-04-09: received
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      author = {Angelo De Caro and Vincenzo Iovino and Giuseppe Persiano},
      title = {Fully Secure Anonymous HIBE and Secret-Key Anonymous IBE with Short Ciphertexts},
      howpublished = {Cryptology ePrint Archive, Paper 2010/197},
      year = {2010},
      note = {\url{}},
      url = {}
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