CNN CNN Newsroom With Carol Costello December 11, 2015 15:28:00
Advanced encryption that cannot be desiperred. brian todd joins us. you actually got a demonstration. what did you learn? >> we learned how remarkably easy it is using encryption technology available to all of us. case in point was the morning of the garland, texas, attacks last may. the fbi is still frustrated they still cannot break the encrypted communications that were flying around just before that attack. >> reporter: in the hours leading up to this nearly catastrophic terror attack, the prophet mohamed drawing, fbi was communicating with someone overseas. >> he exchanged 109 messages wi...
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