Security Analysis and Modification of ID-Based Encryption with Equality Test from ACISP 2017
At ACISP 2017, Wu et al. provided an identity-based encryption scheme with equality test that considers to prevent insider attacks. In this paper, we demonstrate that their scheme does not achieve the claimed security requirement by presenting an attack. Subsequently, we provide a modification of their construction.
We would like to thank the authors of  and the anonymous reviewers of ACISP 2018 for their valuable comments and discussions. Hyung Tae Lee would also like to thank Jae Hong Seo for the helpful discussion about a keyed permutation in our modification. Hyung Tae Lee was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science and ICT (No. NRF-2018R1C1B6008476). Huaxiong Wang was supported by Singapore Ministry of Education under Research Grant MOE2016-T2-2-014(S) and RG133/17-(S). Kai Zhang was supported by the Open Foundation of Co-Innovation Center for Information Supply & Assurance Technology (No. ADXXBZ201701).
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