The Waula application is a social on line storage which allows for a way to store pictures or other items.  The application provides a key on your local computer, after being invited to join a thread.  This allows for group to have access to pictures, etc without others being able to access the data without being in the same group (shared key).  This is a good application for genealogy online among family members.  Family members are invited to join, a key stored onto the member's PC.  Without the key on the PC the data is not viewable/reachable.  Data is encrypted and decrypted for use.  This allows family members to conduct research which is encrypted/decrypted.  This also allows for multiple copies of pictures to family members.  Again, the data stored on the online storage is encrypted and required to be decrypted using a key.  Thus your user name and password must have a key from your PC to access data on the online storage.  There is a public folder in which others may view.