多方参与高效撤销组成员的共享数据审计方案

Shared Data Auditing Scheme for Efficient Revocation of Group Members via Multi-participation

针对云平台上共享数据的完整性验证问题,该文提出一种多方参与高效撤销组成员的共享数据审计方案(SDRM)。首先,通过Shamir秘密共享方法,使多个组成员共同参与撤销非法组成员,保证了组成员间的权限平等。然后,结合代数签名技术,用文件标识符标识数据拥有者的上传数据记录和普通组成员的访问记录,使数据拥有者能够高效更新其所有数据。最后对方案的正确性、安全性和有效性进行理论分析和实验验证,结果表明,该文方案的计算复杂度与被撤销组成员签名的文件块数之间相互独立,达到了高效撤销组成员的目的。并且,随数据拥有者数量增加,该方案更新数据效率较NPP明显提升。

In the view of the integrity verification problem of data sharing on the cloud platform,a Shared Data auditing scheme for efficient Revocation of group Members via multi-participation(SDRM)is proposed.First,through the Shamir secret sharing method,multiple group members participate in revoking the illegal group members,ensuring the equal rights between the group members.Second,this scheme combines with algebraic signature technology,the file identifier identifies the data owner’s upload data record and the normal group member’s access record,enabling the data owner to update efficiently all of its data.Finally,theoretical analysis and experimental verification of the correctness,safety and effectiveness of the scheme show that the scheme meets the requirement of efficient cancellation of group members,at the same time,as the number of data owners increases,the efficiency of updating data in this scheme is significantly higher than that of NPP.