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Paper: Chosen-Ciphertext Secure Fuzzy Identity-Based Key Encapsulation without ROM

Authors:
Liming Fang
Jiandong Wang
Yongjun Ren
Jinyue Xia
Shizhu Bian
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URL: http://eprint.iacr.org/2008/139
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Abstract: We use hybrid encryption with Fuzzy Identity-Based Encryption (Fuzzy-IBE) schemes, and present the first and efficient fuzzy identity-based key encapsulation mechanism (Fuzzy-IB-KEM) schemes which are chosen-ciphertext secure (CCA) without random oracle in the selective-ID model. To achieve these goals, we consider Fuzzy-IBE schemes as consisting of separate key and data encapsulation mechanisms (KEM-DEM), and then give the definition of Fuzzy-IB-KEM. Our main idea is to enhance Sahai and Waters' "large universe" construction (Sahai and Waters, 2005), chosen-plaintext secure (CPA) Fuzzy-IBE, by adding some redundant information to the ciphertext to make it CCA-secure.
BibTeX
@misc{eprint-2008-17816,
  title={Chosen-Ciphertext Secure Fuzzy Identity-Based Key Encapsulation without ROM},
  booktitle={IACR Eprint archive},
  keywords={public-key cryptography / chosen-ciphertext security; hybrid encryption; fuzzy Identity Based Encryption; key encapsulation mechanism},
  url={http://eprint.iacr.org/2008/139},
  note={ fangliming@nuaa.edu.cn 13978 received 28 Mar 2008, last revised 9 Apr 2008},
  author={Liming Fang and Jiandong Wang and Yongjun Ren and Jinyue Xia and Shizhu Bian},
  year=2008
}