| 摘要: |
| 给出一个简单的代理重签名方案及其两个等价的安全模型:基于通用可组合安全框架的安全模型和基于游戏的安全模型.提出的方案是双向的、多用的、可传递的和密钥最优化的,其安全性可以规约到随机预言机模型下的计算Diffie-Hellman假设.该方案同时也满足通用可组合安全性. |
| 关键词: 代理重签名 通用可组合安全 可证明安全 |
| DOI： |
| 分类号: |
| 基金项目:Supported by the National High-Tech Research and Development Plan of China under Grant No.2007AA01Z456 (国家高技术研究发展计划(863)); the National Basic Research Program of China under Grant No.2007CB311201 (国家重点基础研究发展计划(973)); the National Laboratory of Modern Communications of China under Grant No.9140C1103020803 (现代通信国家重点实验室); the Shanghai Normal University General Project of China under Grant No.SK201037 (上海师范大学一般项目) |
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| Simplified Universally Composable Proxy Re-Signature |
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HONG Xuan,CHEN Ke-Fei,WAN Zhong-Mei
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| Abstract: |
| The paper presents a simple proxy re-signature scheme and its two equivalent security model. One is based on the universal composability framework, another is game-based security model. The proposed scheme is bidirectional, multi-use, transitive and key optimal. It is very attractive for its simplicity. Its security can be reduced to the Computational Diffie-Hellman assumption in the Random Oracle Model. It is also secure under the universal composability framework. |
| Key words: proxy re-signature universally composable provable securit |
