Data Storage Security 
For Visual Composer, the following points are relevant to data storage security:
Model persistence
Visual Composer models and related objects can be stored in the local Application Server Java (AS Java) database or deployed to a remote DTR. When a model is first created, it is saved as an empty component with all of its auxiliary files. With each subsequent save, all of the model data is saved once again, including its generated XGL.
Import and Export mechanism
The option in Storyboard enables users to export a .zip file containing the model .gml file and all related files. The .zip file can be saved on any computer or server in the network. Subsequently, using the option, users can import the file back into a development component from which Visual Composer opens models. The Storyboard contains no function that can determine if the model file has been corrupted or otherwise altered since it was exported.
The security of all data in Visual Composer is covered by the security concept for the AS Java. For more information, see SAP NetWeaver Application Server Java Security Guide.