Identity-Based Multi-replicas Data Public Audit Scheme

When users outsource the data to the remote cloud servers, they lose physical control of data while gaining storage convenience and cannot ensure the integrity of cloud data. Therefore, a series of auditing schemes were proposed to solve the problem of cloud data integrity verification. However, the existing public auditing scheme mainly focuses on a single replica, and the dynamic update of data requires a large computational overhead. Aiming at these problems, a new identity-based multi-replicas public auditing scheme is proposed by using homomorphic authentication labels and multi-branch path tree. The analysis results show that the scheme can effectively audit the integrity of cloud data. Compared with similar schemes, it has higher computational efficiency.