Journal of East China Normal University(Natural Sc

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More efficient CCA-secure identity-based dual receiver encryption

CHEN Wen, ZHANG Kai, QIAN Hai-feng   

  1. Department of Computer Science and Technology, East China Normal University, Shanghai 200062, China
  • Received:2015-11-04 Online:2016-11-25 Published:2017-01-13


Dual receiver encryption (DRE) is a special kind of public key encryption (PKE), which allows a ciphertext to be decrypted into the same plaintext by two inde-
pendent receivers. Though DRE is widely used in scenarios where sensitive information should be potentially decrypted by a supervisor or a third party, the most known DRE constructions in the literatures are obtained from traditional PKE settings. As a result, they have extra overhead for distributions and managements of public key certificates, the identity-based dual receiver encryption (ID-DRE) can reduce overhead. The first identity-based DRE scheme is constructed by an efficient identity-based encryption (IBE). First, we use the CCA-secure (secure against chosen-ciphertext attack) PKE from identity-based techniques to construct a new identity-based DRE scheme with the IND-ID-CCA (indistinguishability against adaptively chosen identity and chosen-ciphertext attack) security, which relies on the bilinear decisional Diffie-Hellman assumption. Then, we extend our scheme to obtain an identity-based dual receiver encryption (ID-DRE) scheme with non-interactive opening, which is the first known identity-based dual receiver encryption (ID-DRE) scheme with non-interactive opening.

Key words: dual receiver encryption, identity-based encryption, chosen-ciphertext attack, non-interactive opening