Fully Secure HIBE with Short Ciphertexts

  title={Fully Secure HIBE with Short Ciphertexts},
  author={Allison B. Lewko and Brent Waters},
We construct a fully secure HIBE scheme with short ciphertexts. The previous construction of Boneh, Boyen, and Goh was only proven to be secure in the selective model, under a non-static assumption which depended on the depth of the hierarchy. To obtain full security, we apply the dual system encryption concept recently introduced by Waters. A straightforward application of this technique is insufficient to achieve short ciphertexts, since the original instantiation of the technique includes… CONTINUE READING
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