The attacks in Paris that left at least 129 people dead Friday have reignited the debate on security and privacy in communications systems.
CIA Director John Brennan and other top security officials concerned with how terrorists communicate pointed specifically to the growing use of end-to-end messaging encryption by technology companies like Google, Apple and Facebook.
Just last month, the White House angered law enforcement agencies when it said it would not pursue requirements for so-called backdoor keys that would allow those agencies to unscramble those messages.
Here & Now's Jeremy Hobson speaks with Arik Hesseldahl of Re/code for a look at the debate and how it is intensifying after the Paris attacks.
This segment aired on November 17, 2015.