Demonstrators hold placards featuring an image of former U.S. intelligence contractor Edward Snowden as they take part in a protest against the U.S. National Security Agency (NSA) collecting German emails, online chats and phone calls and sharing some of it with the country's intelligence services in Berlin on July 27, 2013. - 

Last week's investigative piece by the New York Times, ProPublica, and the Guardian showed that the NSA was not only conducting surveillance, but also working to undermine the last ten years of encryption online. Chester Wisniewskisenior advisor at the cyber security firm Sophos, joins Marketplace Morning Report host David Brancaccio to discuss.