This research presents a novel approach to safe access procedure in cloud storage structure by addressing the challenges associated with managing and distributing complex secret keys. The proposed procedure utilizes attribute-based access control and incorporates a client process, an authentication terminal process, and a storage terminal process. The client generates a main secret key and public parameters for each user using an attribute password mechanism. The authentication terminal maintains user attribute, file attribute, and attribute secret key databases. Access control is determined by constructing an access control string from the attributes of the user, file, and file operation type, enabling fine-grained access control and accommodating large-scale user dynamic expansion. Consequently, the access control costs of the cloud storage structure are significantly reduced, while offering a flexible, effective, and secure access control mechanism for safe storage structure access.

Cloud storage, Attribute-based access control, Secure access, Storage technology, Information safety, Access control string, Fine-grained access control, Large-scale user dynamic expansion, Access control expenditure, Flexible access control mechanism, Secure storage structure access.