Dual System Encryption: Realizing Fully Secure IBE and HIBE under Simple Assumptions

@article{Waters2009DualSE,
  title={Dual System Encryption: Realizing Fully Secure IBE and HIBE under Simple Assumptions},
  author={Brent Waters},
  journal={IACR Cryptology ePrint Archive},
  year={2009},
  volume={2009},
  pages={385}
}
We present a new methodology for proving security of encryption systems using what we call Dual System Encryption. Our techniques result in fully secure Identity-Based Encryption (IBE) and Hierarchical Identity-Based Encryption (HIBE) systems under the simple and established decisional Bilinear Diffie-Hellman and decisional Linear assumptions. Our IBE system has ciphertexts, private keys, and public parameters each consisting of a constant number of group elements. These results are the first… CONTINUE READING
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