Paper 2012/057

Anonymous Constant-Size Ciphertext HIBE From Asymmetric Pairings

Somindu C. Ramanna and Palash Sarkar


We present a new hierarchical identity based encryption (HIBE) scheme with constant-size ciphertext that can be implemented using the most efficient bilinear pairings, namely, Type-3 pairings. In addition to being fully secure, our scheme is anonymous. The HIBE is obtained by extending an asymmetric pairing based IBE scheme due to Lewko and Waters. The extension uses the approach of Boneh-Boyen-Goh to obtain constant-size ciphertexts and that of Boyen-Waters for anonymity. Security argument is based on the dual-system technique of Waters. The resulting HIBE is the only known scheme using Type-3 pairings achieving constant-size ciphertext, security against adaptive-identity attacks and anonymity under static assumptions without random oracles.

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Published elsewhere. Unknown where it was published
identity-based encryption(IBE)constant-size ciphertext hierarchical IBEasymmetric pairingsdual-system encryption
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somindu_r @ isical ac in
2013-07-05: last of 5 revisions
2012-02-10: received
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      author = {Somindu C.  Ramanna and Palash Sarkar},
      title = {Anonymous Constant-Size Ciphertext {HIBE} From Asymmetric Pairings},
      howpublished = {Cryptology ePrint Archive, Paper 2012/057},
      year = {2012},
      note = {\url{}},
      url = {}
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