摘要
基于身份的环签名是基于身份密码学和环签名的结合,具有较高的实际应用价值.现有的基于身份的环签名方案大多基于双线性对问题.然而,双线对问题在量子环境下是不安全的.为了设计量子环境下安全的基于身份的环签名方案,本文基于格困难假设,提出一种标准模型下基于身份的格上环签名方案.该方案的安全性基于格中标准的小整数解(SIS)困难假设.与其他标准模型下基于身份的格上环签名方案相比,该签名方案的计算效率进一步提高.
Identity-based ring signature is the combination of the identity-based cryptography and ring signature. It can be used in man- y practical applications. Most of the existing identity-based ring signatures are based the bilinear pairing assumption. However, biline- ar pairing problem is no longer bard in the quantum era. To construct an identity-based ring signature securing in the quantum era, in this paper, we presented an identity-based ring signature scheme based on lattices. The scheme is secure in the standard model. The security of scheme is based on the standard small integer solution （ SIS ） assumption. Compared with other identity-based ring signa- ture schemes from lattices in the standard model, our scheme enjoys higher efficiency.
出处
《小型微型计算机系统》
CSCD
北大核心
2013年第8期1768-1771,共4页
Journal of Chinese Computer Systems
基金
国家自然科学基金重大研究计划项目(90818005)资助
国家自然科学基金项目(60903217
60773032)资助
关键词
基于身份密码学
环签名
格
标准模型
identity-based cryptography
ring signatures
lattices
standard model
