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Title:
CCA-Secure Leakage-Resilient Identity-Based Key-Encapsulation from Simple (not \mathtt{q}-type) Assumptions
Authors: Toi Tomita, Wakaha Ogata, Kaoru Kurosawa, Ryo Kuwayama
Abstract:In this paper, we propose a new leakage-resilient identity-based encryption (IBE) scheme that is secure against chosen-ciphertext attacks (CCA) in the bounded memory leakage model. It is the first CCA-secure leakage-resilient IBE scheme which does not depend on \mathtt{q}-type assumptions. More precisely, it is secure under the external k-Linear assumption. The leakage rate 1/10 is achieved under the XDLIN assumption.
ePrint: https://eprint.iacr.org/2019/982
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