参与者有特殊权限的秘密共享方案

Secret Sharing Scheme among Special Weighted Participants

考虑到某些参与者有特殊权限,基于RSA密码体制和哈希函数的安全性,设计了参与者有特殊权限的秘密共享方案。参与者的秘密份额由自己产生和保管,只需出示伪秘密份额,无需安全信道。在秘密重构时,不仅要求参与者的权值之和达到对应门限值,而且对于具有特殊权限的参与者设定了特别门限,增强了共享秘密的安全性。

Based on the security of RSA cryptosystem and hash function,a secret sharing scheme among special weighted participants was proposed.Each participant＇s secret shadow was produced by himself and external confidentiality was kept.Participant only need to submit a pseudo-shadow instead of his secret shadow.The scheme did not require a secure channel between each participant and the dealer.In the recovery phase,not only the participant＇s sum of weight was requested to achieve the threshold value,but also special threshold was set to the participant which possesses special weight and hence can enhance the security of the shared secret.