Paper 2012/057

Anonymous Constant-Size Ciphertext HIBE From Asymmetric Pairings

Somindu C. Ramanna and Palash Sarkar

Abstract

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.

Metadata
Available format(s)
PDF
Publication info
Published elsewhere. Unknown where it was published
Keywords
identity-based encryption(IBE)constant-size ciphertext hierarchical IBEasymmetric pairingsdual-system encryption
Contact author(s)
somindu_r @ isical ac in
History
2013-07-05: last of 5 revisions
2012-02-10: received
See all versions
Short URL
https://ia.cr/2012/057
License
Creative Commons Attribution
CC BY

BibTeX

@misc{cryptoeprint:2012/057,
      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{https://eprint.iacr.org/2012/057}},
      url = {https://eprint.iacr.org/2012/057}
}
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