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CLC number: TP309

On-line Access: 2018-06-07

Received: 2016-12-21

Revision Accepted: 2017-04-10

Crosschecked: 2018-04-08

Cited: 0

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Citations:  Bibtex RefMan EndNote GB/T7714


Yan-wei Zhou


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Frontiers of Information Technology & Electronic Engineering  2018 Vol.19 No.4 P.481-493


A leakage-resilient certificateless public key encryption scheme with CCA2 security

Author(s):  Yan-wei Zhou, Bo Yang, Hao Cheng, Qing-long Wang

Affiliation(s):  School of Computer Science, Shaanxi Normal University, Xi’an 710119, China; more

Corresponding email(s):   zyw@snnu.edu.cn, byang@snnu.edu.cn, nicke_cheng@yahoo.com.cn, qlwang@chd.edu.cn

Key Words:  Certificateless public-key encryption, Leakage-resilience, Provable security, CCA2 security, Decisional Diffie-Hellman

Yan-wei Zhou, Bo Yang, Hao Cheng, Qing-long Wang. A leakage-resilient certificateless public key encryption scheme with CCA2 security[J]. Frontiers of Information Technology & Electronic Engineering, 2018, 19(4): 481-493.

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In recent years, much attention has been focused on designing provably secure cryptographic primitives in the presence of key leakage. Many constructions of leakage-resilient cryptographic primitives have been proposed. However, for any polynomial time adversary, most existing leakage-resilient cryptographic primitives cannot ensure that their outputs are random, and any polynomial time adversary can obtain a certain amount of leakage on the secret key from the corresponding output of a cryptographic primitive. In this study, to achieve better performance, a new construction of a chosen ciphertext attack 2 (CCA2) secure, leakage-resilient, and certificateless public-key encryption scheme is proposed, whose security is proved based on the hardness of the classic decisional Diffie-Hellman assumption. According to our analysis, our method can tolerate leakage attacks on the private key. This method also achieves better performance because polynomial time adversaries cannot achieve leakage on the private key from the corresponding ciphertext, and a key leakage ratio of 1/2 can be achieved. Because of these good features, our method may be significant in practical applications.




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