A Moscow court decided last week to block the app in Russia because it refused to hand over encryption keys to authorities — sparking fresh controversy around the app, which has previously been banned in countries such as Iran, Afghanistan and Indonesia .Voices from outside Russia have also criticized Telegram for not doing enough to clamp down on terrorists using the app. “Terrorists and extremist groups such as ISIS (Daesh) use encrypted applications like Telegram because it allows them to recruit new members, fundraise, incite to violence, and even coordinate terrorist activity without the threat of being discovered,” said executive director David Ibsen at the US-based non-government organization Counter-Extremism Project."