多策略多重秘密恢复方案的设计  

Design of Multi-Policy Multiple Secret Recovery Scheme

作　　者：闫鸿滨[1] 

机构地区：[1]南通职业大学电子信息工程学院,江苏南通226007

出　　处：《中北大学学报（自然科学版）》2014年第5期553-557,共5页Journal of North University of China(Natural Science Edition)

基　　金：国家自然科学基金资助项目(60773035);四川省学术和技术带头人资助项目(08226056);教育部留学回国人员择优项目

摘　　要：针对目前现有的多秘密恢复方案存在的缺陷,基于环Zn上的圆锥曲线公钥密码体制,设计了一种新的多秘密恢复方案.该方案的安全性基于有限群上计算离散对数的困难性和单向函数求逆的难题,运用该方案的成员可以共享多个密钥,可以增加共享成员而不必改变他们的任何信息,根据秘密的不同等级动态地调整秘密恢复时的门限值.分析表明:该方案具有较高的安全性和动态性,可以高效地检测秘密管理者与分享者的欺作行为,对成员进行身份认证,并且验证子密钥的正确性.In view of the present defects multi-policy secret recovery scheme. Based on the public-key crypto- graphy of conic curve over Zn , a new efficient multi-policy secret recovery scheme was designed. The security of the new scheme was based on the difficulty in computing discrete logarithm and the intractability of revers- ing the one-way function. Using the scheme, the participants could share multiple secrets; the participants could be added or deleted without having to change any information of theirs; as for the multi-secret of the different grade, the multi-secret distributer could dynamically adjust the threshold value. The analysis results show that the scheme is high of security and dynamic, which can detect the cheating of the dealer or any par- ticipant, and provide identity authentication of participants, and validate the correctness of key.

关 键 词：圆锥曲线 多重密钥共享 离散对数 身份认证 

分 类 号：TN918[电子电信—通信与信息系统]