基于身份的密钥隔离群签名方案  

ID-based key-insulated group signature scheme

作　　者：王硕 程相国 陈亚萌 王越 WANG Shuo;CHENG Xiangguo;CHEN Yameng;WANG Yue(College of Computer Science and Technology,Qingdao University,Qingdao,Shandong 266071,China;College of Data Science and Software Engineering,Qingdao University,Qingdao,Shandong 266071,China)

机构地区：[1]青岛大学计算机科学技术学院,山东青岛266071 [2]青岛大学数据科学与软件工程学院,山东青岛266071

出　　处：《计算机工程与应用》2018年第16期76-80,共5页Computer Engineering and Applications

基　　金：国家自然科学基金(No.61572267;No.61303197);山东省自然科学基金(No.ZR2013FQ005)

摘　　要：为了减轻在基于身份的群签名中密钥泄露带来的危害,结合密钥隔离技术,提出了基于身份的密钥隔离群签名方案。方案满足即使当前时间段的临时密钥泄露,也不会影响其他时间段的签名。方案基于CDH困难问题,在随机预言模型下可证安全性,且在相同安全条件下,签名长度更短,构造更简单。In order to reduce the damage caused by key exposure in ID-based group signatures,combined with key isolation technology,this paper proposes an ID-based key-insulated group signature scheme.The scheme ensures that even if the temporary private key of current time period is leaking,it will not affect the signature of other time periods.The scheme is based on the CDH difficult problem,and the security can be proved under the random oracle model.Under the same security conditions,the signature length is shorter and the structure is simpler.

关 键 词：密钥泄漏 基于身份的群签名 密钥隔离 可计算Diffie-Hellman(CDH) 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]