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电子学报  2015 

并行密钥隔离聚合签名

DOI: 10.3969/j.issn.0372-2112.2015.05.030, PP. 1035-1040

Keywords: 密钥隔离,并行性,聚合签名,随机预言模型

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Abstract:

为了应对聚合签名中的密钥泄露问题,将并行密钥隔离机制扩展到聚合签名系统中,给出了并行密钥隔离聚合签名的概念.在给出的形式化定义和安全模型的基础上,提出了第一个并行密钥隔离聚合签名方案,并在随机预言模型下证明了方案的安全性.所提出的方案满足密钥隔离性、强密钥隔离性和安全密钥更新等性质,特别在签名验证方面具有较高的效率.引入的两个协助器交替帮助用户进行临时私钥更新,增强了系统防御密钥泄露的能力.

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