This research introduces a secure network backup system in a cloud storage environment, emphasizing storage security. The method focuses on constructing a trusted network architecture, establishing a trust domain based on user needs, and implementing user identity authentication through a public key infrastructure (PKI) for non-deceptiveness and non-repudiation assurance.

Secure network backup, Cloud storage, Storage security, Trust network, Public Key Infrastructure (PKI), Hash algorithm, Advanced Encryption Standard (AES), File synchronization, Hierarchical key management, Version control, Encryption key selection.