The Islamic State’s agenda and tactics make it a particularly tough foe for cyberwarfare. The Islamic State, officials said, has made tremendous use of Telegram, an encrypted messaging system developed largely in Germany. The shortcomings of Glowing Symphony illustrated the challenges confronting the government as it seeks to cripple the Islamic State in cyberspace. But the fundamental problem of how to use cybertechniques effectively against the Islamic State remains. General Harrigian said allied countries were also employing cyberweapons and techniques against the Islamic State that the United States did not.

Source: New York Times June 12, 2017 09:00 UTC