investigators reportedly discovered a playstation 4. bell began leaders say communications on the gaming console are difficult to moniter. >> it's a huge, huge problem. the social media recruitment, social media radicalization, then they will go off the social media platforms into encrypted platforms to have further conversations about travel, about if you can't travel, take action against your own country. >> reporter: and isis is already using the paris attacks to build its brands online. >> this event is in many respects similar to the events in 9/11 in terms of the game-changing aspect of it. >> reporter: if you think the dark apps are just do main of terrorists, think again. medical and local professionals use them to keep your information private. and british intelligence reportedly uses them for its own communications, jeff. >> glor: contessa, thank you very much. an american college student was killed in the attacks while having dinner with friends. her story when the cbs evening news continues.