Encrypted Sandboxes
Encrypted Box Image support allows you to create encrypted sandboxed environments for an even greater protection of your confidential data. With this feature the box file root is being mounted from an AES-XTS encrypted box image, other ciphers are available as well.
UseFileImage=y
BoxPassword=Some_Password
The feature is yet not complete hence the password is stored in the sandboxie.ini in plain sight.
Upcoming additions to this core functionality will contain secure box passphrase handling and a driver extension to prevent applications not running in the encrypted sandbox from accessing the sandboxed files.