基于身份签名方案的安全性分析

发布时间：2018-11-03 20:35

【摘要】：基于身份的数字签名是一种重要的密码学工具,不仅在基于身份密码体制中实现了签名功能,而且简化了传统数字签名中公钥证书的生成、管理和吊销等问题.Paterson和Schuldt首次构造了标准模型下可证明安全的基于身份的数字签名方案,但是该方案效率不高且通信代价昂贵.李继国和姜平进提出了一个新型的改进方案———标准模型下可证安全的基于身份的高效签名方案,新方案的特点是:标准模型下可证明安全、计算效率更高、通信代价更小.然而,文中发现,该方案并不满足不可伪造性,原因在于用户密钥提取是广义伪造的.进一步指出了原方案安全性证明中的缺陷:敌手的view与安全性模拟中成功的事件不独立.
[Abstract]:ID-based digital signature is an important cryptographic tool. It not only realizes signature function in ID-based cryptosystem, but also simplifies the generation of public key certificate in traditional digital signature. For the first time, Paterson and Schuldt have constructed identity-based digital signature schemes that can prove secure under the standard model, but the scheme is inefficient and costly. Li Jiguo and Jiang Ping put forward a new kind of improved scheme, which is identity-based and efficient signature scheme based on proof security under standard model. The new scheme is characterized by proof security under standard model, higher computing efficiency and lower communication cost. However, it is found that the scheme does not satisfy the unforgeability, because the user key extraction is generalized forgery. Furthermore, the defects in the security proof of the original scheme are pointed out: the view of the enemy is not independent of the successful events in the security simulation.
【作者单位】：电子科技大学计算机科学与工程学院;河海大学计算机与信息学院;福建师范大学数学与计算机科学学院;
【基金】：国家自然科学基金(61003232,61272542,61202540) 教育部博士点新教师基金(20100185120012) 国家自然科学基金外国青年学者研究基金(61150110483,612111150) 电子科技大学中央高校基本业务费(ZYGX2010J066,ZYGX2011J067)资助~~
【分类号】：TN918.4

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