摘要
基于Shamir门限方案和RSA密码体制,提出一个一般访问结构上的秘密共享方案.参与者的秘密份额由参与者自己选取,秘密分发者不需要向各个参与者传送任何秘密信息.当秘密更新、访问结构改变或参与者加入/退出系统时,各参与者的秘密份额不需要更新.秘密份额的长度小于秘密的长度.每个参与者只需要维护一个秘密份额就可以实现对多个秘密的共享.每个参与者能够验证其他参与者是否进行了欺骗.方案的安全性是基于Shamir门限和RSA密码体制的安全性.
Based on Shamir's threshold scheme and the RSA cryptosystem, a new secret sharing scheme is proposed. Each participant' s secret shadow is secreted by the participant himself and the dealer does not need to deliver any secret information to each participant. The shadows do not need to be changed when the shared secret is renewed, the access structure is altered, or old participants are deleted/or new participants are added. All these shadows are shorter than or as short as the shared secret. Each participant shares many secrets with other participants by holding only one shadow. Each participant is allowed to check whether another participant provides the true information or not. The security of this scheme is the same as that of Shamir' s threshold scheme and the RSA cryptosystem.
出处
《山东师范大学学报(自然科学版)》
CAS
2012年第1期44-46,共3页
Journal of Shandong Normal University(Natural Science)
基金
国家自然科学基金资助项目(10761008)
关键词
信息安全
秘密共享
RSA
访问结构
information security
secret sharing
RSA
access structure