CCA-Secure Leakage-Resilient Identity-Based Key-Encapsulation from Simple (Not $$\mathtt {q}$$ -type) Assumptions

Toi Tomita,Wakaha Ogata,Kaoru Kurosawa

doi:10.1007/978-3-030-26834-3_1

CCA-Secure Leakage-Resilient Identity-Based Key-Encapsulation from Simple (Not $$\mathtt {q}$$ -type) Assumptions

Toi Tomita, Wakaha Ogata + Show 1 more

https://doi.org/10.1007/978-3-030-26834-3_1

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Publication Date: Jan 1, 2019

Citations: 2

Affiliation: National Institute of Advanced Industrial Science and Technology, Tokyo Institute of Technology, Ibaraki University

#Leakage-resilient Identity-based Encryption Scheme #Leakage-resilient Identity-based Encryption + Show 8 more

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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 DLIN assumption for symmetric bilinear groups and under the XDLIN assumption for asymmetric bilinear groups, respectively.

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