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可验证多重秘密共享方案普遍不能区分共享群组密钥的安全等级,即分享群组密钥的门限值相等,为此,提出了一种可验证的多策略秘密共享方案.在该方案中,密钥分发者能根据分发群组密钥的安全等级选择不同的门限值;在群组密钥分发和重构过程中,能实现参与者对密钥分发者和重构者对参与者的验证,及时检测和识别密钥分发者对参与者以及参与者对密钥重构者的欺骗,从而提高重构群组密钥的成功率;参与者的子密钥能重复使用,可减少密钥分发者的计算负担,提高方案的效率.该方案具有较高的安全性和实用性.
Verifiable multi-secret sharing scheme generally can not distinguish the security level of the shared group key, that is, the threshold of sharing group key is equal, so a verifiable multi-policy secret sharing scheme is proposed. , The key distributor can select different thresholds according to the security level of the distribution group key. In the process of group key distribution and reconstruction, it is possible to realize that the key distributor and the reformer have the right to participate to the participants , Detect and identify the spoofing of the key distributor by the key distributor in a timely manner so as to improve the success rate of reconstructing the group key. The sub-key of the participants can be reused and can be reduced The burden of calculating the key distributor and improving the efficiency of the scheme.The scheme has high security and practicability.