不同权限下自证实的多秘密共享方案

为了解决现有不同权限下秘密共享方案中子秘密的安全分发问题，利用双一元多项式，结合基于身份的公钥密码技术，提出一种新的基于不同权限的门限秘密共享方案，并给出其推广形式。该方案中，子秘密由秘密分发者和参与者分别生成，参与者的子秘密可反复使用，共享任意多个秘密。任何人可验证参与者身份和子秘密的合法性，有效防止参与者欺诈。分析表明，新方案不仅安全，而且效率也优于已有文献。

Self-certified threshold multi-secret sharing scheme under different access right

In order to solve the secure distribution problems in the existing secret sharing scheme under different access right,based on the ID-based public key cryptography technology,a new secret sharing scheme under different access right is proposed,which adopts two polynomials,and then a generalized scheme is given.In the scheme,each participant’s share is selected by the participant himself and secret dealer separately;the shares can be repeatedly used for the reconstruction of multiple secrets.The cheating between participants can be detected by verifying every participant’s identity and share.Analysis shows the proposed scheme is secure.Furthermore,its efficiency is also better than others.