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| New Verifiably Encrypted Signature Scheme Based on Shim's Signature |
| Gu Li-ze① Sun Yan-bin① Qing Si-han② Zheng Shi-hui① Yang Yi-xian① |
| ①(Information Security Center, State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing 100876, China) ②(School of Software and Microelectronics, Peking University, Beijing 102600, China) |
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Abstract Utilizing the Shim's identity-based signature scheme, a new identity-based verifiably encrypted signature scheme is proposed. As a building block of the fair exchange protocol, this approach does not use any zero-knowledge proofs to provide verifiability, it avoids most of the costly computations. Compared to the previous identity-based verifiably encrypted signature schemes, the proposed scheme is more efficiency. The performance analysis results show that the scheme is provably secure in the random oracle model under the CDH problem assumption.
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Received: 15 October 2010
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Corresponding Authors:
Sun Yan-bin
E-mail: ybsun@fomail.com
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2011, Vol. 33 
