People being able to communicate securely while leaving no trace behind is not new. Granted, it is new that we can communicate world wide this way, but I don't

People being able to communicate securely while leaving no trace behind is not new. Granted, it is new that we can communicate world wide this way, but I don't see how that changes much. "The world" to an individual has always been, and still is mostly, filled with people they could easily meet with for a secret conversation. Also, are not our minds like an unbreakable safe? Human minds have been around for a long time.