phone, hardest to crack for the intelligence agencies. use particular applications that are anonomized, the dark net. >> reporter: isis may have made one cyber enemy. anonymous, now vowing to unleash a wave of cyberattacks on isis in retaliation for the paris massacre. matthew green says people at anonymous are probably better hackers than the ones isis has. but he doesn't think they're going to be able to do much damage to isis and he says they certainly cannot break the enkrep enkrepe encryption, those, wolf, too well designed. >> joining us ranking democrat of the house intelligence committee, congressman adam schiff of california. thanks very much for joining us. what can you tell us about the encrypted communications that everyone suspects these terrorists were using? >> this is becoming an increasing big issue, the dark problem. we know as brian pointed out