CCA secure IB-KEM from the computational bilinear diffie-hellman assumption in the standard model

  • Authors:
  • Yu Chen;Liqun Chen;Zongyang Zhang

  • Affiliations:
  • Institute of Information Engineering, Chinese Academy of Sciences, China,State Key Laboratory of Information Security, Beijing, China;Hewlett-Packard Laboratories, Bristol, United Kingdom;Department of Computer Science and Engineering, Shanghai Jiao Tong University, Shanghai, China

  • Venue:
  • ICISC'11 Proceedings of the 14th international conference on Information Security and Cryptology
  • Year:
  • 2011

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Abstract

In this paper, we propose several selective-identity chosen-ciphertext attack (IND-sID-CCA) secure identity based key encapsulation (IB-KEM) schemes that are provably secure under the computational bilinear Diffie-Hellman (CBDH) assumption in the standard model. Our schemes compare favorably to previous results in efficiency. With delicate modification, our schemes can be strengthened to be full-identity CCA secure easily.