Telegram says it has 500 million customers international. Most use the app to speak, but there may be greater to it than that.
BBC World Service Disinformation reporter Jack Goodman takes a have a look at what is in the back of the upward thrust of Telegram.
The BBC documentary, 'Telegram: Why won't you're taking my naked pictures down?' may be posted later this week. Jacqueline Galvin created the motion graphics.