According to The Independent newspaper, ISIL released online safety guidelines for its sympathizers via the messaging app called Telegram which encrypts messages.
"Do not open any kind of link unless u r sure from the source. Use vpn and change ur IP constantly for security reasons. Phones and computers. Do not talk to people u don’t know on Telegram and block them if u have to cause they are many glitches in Telegram and they can hack you by it," the group said, as quoted by the newspaper.
The messages were intercepted by London’s International Centre for the Study of Radicalisation.
On November 13, at least 130 people were killed and over 350 injured in suicide bombings and shootings at a football stadium, a concert hall and restaurants in the French capital. ISIL militants claimed responsibility for the attack.