Use SolFS filesystem adapter
SolFS lets you store the files in the virtual filesystem, backed by the container file or other backend storage. The container can be optionally encrypted and compressed. Use of SolFS lets you isolate the data of different users in various server solutions.
You should create an instance of TElSolidFileSystemAdapter class and set its Storage property to an instance of SolFSStorage class. Then this provider should be assigned to FileSystemAdapter property of data security component.
For more information about SolFS please visit SolFS web site.