先动的可公开验证服务器辅助秘密共享

Proactive and Publicly Verifiable Server-Assisted Secret Sharing

如何保护密钥的安全性是一个重要的安全问题.为了应对这个问题,提出了一个先动的可公开验证服务器辅助秘密共享方案,方案中秘密可公开验证的共享在用户和一组服务器中,秘密重构是用户驱动的.另一个重要特点是方案具有双向发起的先动属性,即用户和服务器的份额在每个时间周期都进行更新,每次的更新操作是用户和服务器双方发起的。使方案十分公平。并使敌手更难危及密钥的安全性.

How to protect the security of secret keys is an important problem of security. A proactive and publicly verifiable server-assisted secret sharing scheme is proposed. The secret in this scheme is publicly verifiably shared between a user and a group of servers, and the secret reconstruction is activated by the user. Another important trait of the scheme is that it has two-side initial proactive property, that is, the shares of the user and servers will be renewed in each time period and the renewal operation is initiated by the cooperation of the user and servers. This will make the scheme very fair and make it difficult for an adversary to compromise the secret.