摘要
为了解决现有秘密共享方案中秘密份额的安全分发问题,基于Girault密钥交换协议,结合基于身份(ID)的公钥密码技术提出了一个新的秘密共享方案,并对其进行了安全性和性能分析.该方案中,用户的私钥作为其秘密份额,无须秘密分发者为每个用户分发秘密份额.用户的私钥可以由用户自己选取,可信第三方无法获取其私钥.同时,任何人都可以以离线方式验证每一个参与者公钥的合法性.分析表明,文中所提出的基于身份的秘密共享方案具有更高的安全性和有效性,能更好地满足应用需求.
In order to resolve the secure distribution problem in the existing secret sharing schemes,based on Girault s key exchange protocol,a new secret sharing scheme is proposed,which adopts the ID-based public key cryptography technology.And then,security and performance analysis is made on this scheme.Each participant s private key is used as his secret shadow,which are not selected and redistributed by the secret dealer any longer.The private key of each participant is chosen by the participant himself,and even the trusted third party cannot gain his private key. At the same time, anyone can verify every participant＇s public key, and judge whether it is valid in the form of off line. Analysis shows that the proposed ID-based secret sharing scheme is more secure and effective than others, and it can be more applicable.
出处
《计算机学报》
EI
CSCD
北大核心
2010年第1期152-156,共5页
Chinese Journal of Computers
基金
国家自然科学基金(60803150
60803151)
国家"八六三"高技术研究发展计划项目基金(2008AA01Z411)
国家自然科学基金委员会-广东联合基金重点项目(U0835004)
中国博士后科学基金(20090451495)
陕西省自然科学基础研究计划项目(2007F37)资助~~
关键词
密钥交换
基于身份的公钥密码技术
秘密共享
key exchange
ID-based public key cryptography technology
secret sharing
