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| A Dynamic Threshold Attributes-based Signcryption Scheme |
| Zhang Guo-yin① Fu Xiao-jing①② Ma Chun-guang①② |
①(College of Computer Science and Technology, Harbin Engineering University, Harbin 150001, China)
②(Network and Data Security Key Laboratory of Sichuan Province, University of Electronic Science and Technology of China, Chengdu 611731, China) |
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Abstract Signcryption combines the functionalities of signature and encryption and costs less than that required by the traditional signature-then-encryption approach. On the basis of Li et al. (2010) attribute-based signature, a new attributes-based signcryption is proposed in this paper, in which not only confidentiality and authentication is provided but also attribute-signcryptor privacy and multi-recipient is achieved. This scheme is provable secure in the random oracle model and it satisfies indistinguishability against adaptive chosen ciphertext attack based on Decisional Bilinear Diffie-Hellman (DBDH) assumption and satisfies existential unforgeability against adaptive chosen message attack based on the standard Computational Diffie-Hellman (CDH) assumption.
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Received: 29 March 2012
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Corresponding Authors:
Zhang Guo-yin
E-mail: zhangguoyin@hrbeu.edu.cn
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2012, Vol. 34 
