reporter: the gunman could have been communicating with hussein, the notorious head of isis s hacking division, killed recently in a drone attack. he s said to have inspired the attack and may have directed it. this terror chatter in the dark is one of the major stops. terror groups are perfecting the use of encrypted communications. conversation chopped up into a jumble by mathematical algorithm ims. they do a good job of keeping what their saying. reporter: jihadists have their own brand, developed or modified by supporters of al qaeda. experts say it helps terrorists communicate in secret and there s a mobile version of it. isis developed a mobile app that provides updates on news and propaganda with video. and jihadi websites publish
attack, the prophet of mohamed, one gunman believed to be an isis sympathizers communicating with isis overseas. he exchanged 109 messages with an overseas terrorist. we have no idea what he said because those messages were encrypted. to this day i can t tell you what he said with that terrorist 109 times the morning of that attack. that is a big problem. reporter: the gunman could have been communicating with the notorious head of isis hacking division, killed recently in a u.s. drone strike. hussein s belief to have inspired the garland attack and may have directed it. this kind of terror chatter in the dark is one of the greatest challenges in stopping the next major terror attack. u.s. officials say terror groups are perfecting the use of encrypted communications, conversations chopped up into a jumble by mathematical algorithms. they do a very good job of hiding whatever you re saying from being intercepted from somebody like a government. reporter: islamic extremists eve
20-year-old alleged hacker? in terms of effort, with the right amount of money and ideological commitment and enough time on your hands, you can pull something like that off. they said they will commit themselves to battling. after he hacked the u.s. service members data, ferizi gave it to the notorious head of isis hacking division killed recently in a u.s. drone strike. hussein is said to have instigated this attack. the foiled attempt to shoot up a prophet mohammed contest in texas. the kill list was published online this summer. crusaders noah that we are in your e-mails and watching and recording your every move and that isis operatives will strike in your own lands next.
hosting company in phoenix, stole the names, addresses, phone numbers, photographs and passwords of more than 1300 u.s. service members and other government staffers. then he gave the data to isis to target the u.s. personnel for attacks and violence. how dangerous is this 20-year-old alleged attacker? with the right amount of money and commitment and enough time on your hands, you can pull something off like that. i mean, they said they will commit themselves to that also includes online. after he hacked the u.s. service members data, he gave it to the notorious head of isis hacking division, killed recently in a u.s. drone strike. hussein is believed to have start the foiled attempt in may to shoot up a prophet mohammed cartoon drawing contest in garland, texas. he and his british born wife