摘要
密钥共享技术是密钥管理中的关键技术之一,针对基于有限群上计算离散对数的难度和单向函数求逆的难题,提出了一种基于环Z_n上的圆锥曲线公钥密码体系的多秘密共享方案,利用上述方案,可在系统成员中可以方便、安全、有效地共享多重密钥;根据需要,系统可以定期更新共享的秘密,具有动态安全性;可以根据秘密的不同等级动态地调整其恢复时的门限值,可以高效地检测秘密管理者与分享者的欺作行为,对共享者进行身份认证,验证子密钥的正确性。
Secret sharing technology is one of critical technologies about key management. An efficient multilevel -secret sharing scheme was designed on the public-key cryptography of conic curve over Zn. The scheme made comprehensively use of difficulties in computing discrete logarithm and the intractability of reversing the one-way Hash function. In the scheme, participants can share multiple secrets and compute sub-secret for rebuilding efficiently and securely. As for the multi- secret of the different grade, the multi- secret distributer can dynamically adjust the threshold value ; cheating of the dealer or any participant can he detected efficiently; identity authentication of participant can be provided; and the shadows of key can be validated.
出处
《计算机仿真》
CSCD
北大核心
2014年第5期171-174,共4页
Computer Simulation
基金
国家自然科学基金项目(60773035)
四川省学术和技术带头人资助项目(08226056)
关键词
圆锥曲线
多重密钥共享
离散对数
身份认证
Conic curve
Multi-secret sharing
Discrete logarithm
Identity authentication
