具有内部安全性的常数对无证书聚合签密方案

doi:10.11999/JEIT170419

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Abstract Aggregate signcryption can not only reduce the cost of the verification of ciphertexts, but also ensure the confidentiality and authentication. Analyzed Liu et al ’s CertificateLess Aggregate SignCryption (CLASC) scheme with Const Pairings, it is found that type II adversary, who is the malicious key generator center, could forge the ciphertexts. It means that Liu et al’s scheme does not satisfy the indistinguishability under the adaptive chosen ciphertext attacks and unforgeability under the adaptive chosen message attacks. In order to improve the security level and verification efficiency of CLASC scheme, in this paper, the internal secure model of CLASC is defined and a concrete CLASC scheme with this property is presented. As the new scheme only needs 3 bilinear pairingis, it is more efficient than existing CLASC schemes. Based on the assumption of computational Diffie-Hellman, in the random oracle model and the internal security mode of CLASC, the new schems is proved to satisfy the confidentiality, unforgeability and public verification.

Key words： Certificateless signcryption Aggregate signcryption Internal security Computational Diffie-Hellman problem Attack of Key Generator Center (KGC)

Received: 05 May 2017 Published: 01 November 2017

PACS:

TP309

Fund:The National Natural Science Foundation of China (61163038, 61262056), The Higher Educational Scientific Research Foundation of Gansu Province (2017A-003, 2015B-220)

Corresponding Authors: ZHANG Yulei E-mail: zhangyl@nwnu.edu.cn

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	ZHANG Yongjie
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	WANG Caifen

Cite this article:

ZHANG Yongjie,ZHANG Yulei,WANG Caifen. Certificateless Aggregate Signcryption Scheme with Internal Security and Const Pairings[J]. JEIT, 2018, 40(2): 500-508.

URL:

http://jeit.ie.ac.cn/EN/10.11999/JEIT170419 OR http://jeit.ie.ac.cn/EN/Y2018/V40/I2/500

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