Are we moving into an era of open-source warfare? A time when just about everything except the plans in people's heads are public? Or, a little less generously, only face-to-face communications have a chance of being private? 
I'm interested in both fiction and non-fiction speculation on the subject.
 This reminds me of Varley's "The Persistence of Vision", in which a community of blind and deaf people develop Touch, a language which is entirely skin-to-skin. It would probably have better odds of privacy, but I'm no longer optimistic enough about people to think that Touch would reliably lead to benevolence.
Link thanks to Harold Feld at Facebook.
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