Nothing that you do not control yourself can be considered secure. If you must use a 'cloud storage', consider it to tantamount to be 'in the public domain'. In

Nothing that you do not control yourself can be considered secure. If you must use a 'cloud storage', consider it to tantamount to be 'in the public domain'. In other words, don't put anything in 'cloud storage' that you would not be happy seeing printed on the front page of the New York Times for all the world to see.