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Paper 2019/982
CCA-Secure Leakage-Resilient Identity-Based Key-Encapsulation from Simple (not $\mathtt{q}$-type) Assumptions
Toi Tomita and Wakaha Ogata adn Kaoru Kurosawa and 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 DLIN and XDH assumption for symmetric and asymmetric bilinear groups, respectively. The leakage rate 1/6 is achieved under the XDH assumption.
Note: This is an extended version of the paper presented in IWSEC 2019.
Metadata
- Available format(s)
- Category
- Public-key cryptography
- Publication info
- Published elsewhere. Major revision. The 14th International Workshop on Security (IWSEC 2019)
- Keywords
- public-key cryptography
- Contact author(s)
- ogata w aa @ m titech ac jp
- History
- 2019-11-29: revised
- 2019-08-29: received
- See all versions
- Short URL
- https://ia.cr/2019/982
- License
-
CC BY