Ars Technica 
June 18, 2013
Edward Snowden, the National Security Agency (NSA) leaker, is continuing to speak out. He just wrapped up a public Q&A session from an undisclosed location in Hong Kong, answering moderated questions via live chat  on The Guardian’s website on Monday. Snowden gave more details about exactly how NSA encryption works and how the public debate was progressing from his point of view.
Glenn Greenwald, the journalist who first broke Snowden’s story, noted that the chat was “subject to Snowden’s security concerns and also his access to a secure Internet connection. It is possible that he will appear and disappear intermittently, so if it takes him a while to get through the questions, please be patient.”
A reader named Mathius1 asked a question probably on the minds of many Ars readers: “Is encrypting my e-mail  any good at defeating the NSA surveillance? Is my data protected by standard encryption?”
“Encryption works,” Snowden responded. “Properly implemented strong crypto systems are one of the few things that you can rely on. Unfortunately, endpoint security is so terrifically weak that NSA can frequently find ways around it.”