Do people care about encryption when choosing and using messaging apps?
"Do people want to pay for privacy?"
Although ISIS and other groups endorse the app, researchers question its security.
Iran has a history of blocking messaging apps and social media.
There's a growing number of slick, easy-to-use encryption apps.
A resercher claimed to have "hacked" secure messaging app Telegram. But there's no reason to freak out just yet.
The Wickr app could become the Tristero of digital communication.