New Verifiably Encrypted Signature Scheme Based on Shim's Signature
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摘要: 该文利用Shim基于身份的数字签名方案，提出了一个新的基于身份的可验证加密签名方案。作为设计公平交换协议的基本模块，该方案没有使用零知识证明系统提供验证，有效地避免了大量运算。与已有基于身份的可验证加密签名方案相比，该方案效率较高。安全性分析表明，在假设CDH问题是难解的情况下，该方案在随机预言模型中是可证安全的。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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