标准模型下基于身份的高效多签密方案

发布时间：2018-03-06 09:35

本文选题：基于身份　切入点：多签密　出处：《计算机技术与发展》2016年12期 　论文类型：期刊论文

【摘要】：签密能够同时实现加密和认证功能,并且其计算代价小于传统的将两者组合使用的方式。所以用标准模型来构建高效安全的基于身份的签密方案是当下密码学领域的热点问题之一。该方案利用椭圆曲线上的双线性对,构建了将标准模型下基于身份的加密算法同多接收者情况下的签名算法两者优点相结合的基于身份的多接收者签密方案构架和安全概念,形成了具有安全、高效性的多接收者签密方案。针对现有基于身份的多签密方案存在效率不高的问题,提出了一种高效的基于身份的多签密方案。新方案在参与签密者人数为n(n1)时减少了大量的幂运算,并在标准模型下进行了安全性分析及效率分析,证明了新方案可归约于CDH困难假定以及计算量的减少。与原有方案相比,在保证安全性的同时,多签密效率有了大幅提高。
[Abstract]:Signcryption enables both encryption and authentication. And its computational cost is less than the traditional way of combining the two. So it is one of the hot issues in the current cryptography field to construct an efficient and secure identity-based signcryption scheme using the ellipse. Bilinear pairs on a curve, An identity-based multi-receiver signcryption scheme and a security concept are constructed, which combine the advantages of the standard ID-based encryption algorithm and the signature algorithm in the case of multi-receiver, and form a secure multi-receiver signcryption scheme. Efficient multi-receiver signcryption scheme. The existing identity-based multi-signcryption scheme is inefficient. This paper presents an efficient identity-based multi-signcryption scheme, which reduces the number of power operations when the number of sign-signers is nn-1), and analyzes the security and efficiency of the scheme under the standard model. It is proved that the new scheme can be reduced to the CDH difficult assumption and the computational complexity is reduced. Compared with the original scheme, the efficiency of multi-signcryption is greatly improved while the security is guaranteed.
【作者单位】：南京邮电大学计算机学院;
【基金】：国家自然科学基金资助项目(61073188)
【分类号】：TN918.4

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