Saving digital files in commercial memory banks called cloud storage is a cheap and convenient way for long-term storage of documents, photos, music and video. Private users as well as businesses can access them from anywhere and share them with whomever they give the password to. Providers, such as Dropbox, Google Drive or Amazon S3, claim almost absolute security. But computer scientists say the protection should be in the users' hands. VOA's George Putic has more.