Improved security proofs of Delerablée's identity-based broadcast encryption scheme

  • Authors:
  • Sun-Mi Park;Seong-Oun Hwang

  • Affiliations:
  • Department of Mathematical Sciences, Korea Advanced Institute of Science and Technology, Korea;Department of Computer and Information Communications Engineering, Hongik University, Korea

  • Venue:
  • ICHIT'11 Proceedings of the 5th international conference on Convergence and hybrid information technology
  • Year:
  • 2011

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Abstract

Delerablée proposed the first identity-based broadcast encryption scheme with constant size ciphertexts and private keys in [7]. But, the scheme was proved to be secure in the selective identity security model. We prove the scheme is secure in the full security model under an interactive assumption.