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U.S. officials urge Americans to use encrypted apps amid unprecedented cyberattack
(www.nbcnews.com)
This is a most excellent place for technology news and articles.
I vaguely recall Bruce Schneier saying that there is good evidence that the NSA cannot crack certain encryption methods. At the time, RSA was on the list. Maybe common methods mean roll-your-own corporate encryption, but it's my understanding that GNUpg and similar software are safe.
Well, GPG doesn't have PFS, but its a good starting point to say hello and then upgrade to some better encrypted messaging app