摘要
江明明等在2014年提出的格上代理签名方案,不能提供代理授权的公开可验证性,且需要安全信道来传输授权信息。针对这一问题,引入授权证书,提供了代理授权的公开可验证性,解除了原方案对安全信道的依赖。同时,改变原方案的授权方式,将代理签名的签名操作次数从2次降到了1次,提高了方案效率。另外,改进方案还引入了一个撤销列表,实现了代理授权在有效期内的撤销功能。分析表明,相比较于江明明等人的方案,新方案从安全性和效率上,都有了较大的改进。
Jiang's lattice-based proxy signature scheme couldn't provide public verifiability of delegation,and depends on the existence of secure channel to transmit delegation information. To solve this problem,an improved scheme was presented by introducing the warrant to realize the delegation's public verifiability and getting rid of the dependence on secure channel. Furthermore,in the new proxy signature algorithm,authorization method was changed,and the basic signature operation downed from two times to one time,so that the scheme's efficiency was further improved. In addition,a revocation list was introduced,and the delegation revocation was achieved during the period of validity. The proposed scheme has with better security and efficiency compared to Jiang's scheme.
出处
《四川大学学报(工程科学版)》
EI
CAS
CSCD
北大核心
2016年第1期139-145,共7页
Journal of Sichuan University (Engineering Science Edition)
基金
国家自然科学基金资助项目(61402015)
河北省教育厅青年基金资助项目(QN2015084)
廊坊市科技支撑计划资助项目(2014011029)
廊坊师范学院博士基金资助项目(LSLB201408)
关键词
基于格的密码体制
代理签名
授权撤销
无陷门签名
后量子密码
lattice-based cryptography
proxy signature
delegation revocation
signature without trapdoor
post quantum cryptography