Secure Proxy Multi-signature Scheme in the Standard Model

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• 作者：Zhenhua Liu ; Yupu Hu ; Hua Ma
• 关键词：proxy multi ; signature ; standard model ; bilinear pairings ; provable security
• 刊名：Lecture Notes in Computer Science
• 出版年：2008
• 出版时间：2008
• 年：2008
• 卷：5324
• 期：1
• 页码：127-140
• 全文大小：254.1 KB

文摘

In electronic world, proxy signature is a solution of delegation of signing capabilities. Proxy multi-signature schemes allow a proxy signer to generate a proxy signature on behalf of two or more original signers. However, the security of the known proxy multi-signature schemes is proven in the random oracle which does not imply security in the real world. In this paper, we present a proxy multi-signature scheme in the standard model. The size of a proxy multi-signature is independent of the number of the original signers. Our scheme is existentially unforgeable against chosen message attack and chosen warrant attack based on the hardness of the well known CDH problem in the standard model.