This week, we’re talking about trust and cooperation, and the implications these social values have for security in the era of global networking. We’re joined by security technologist and author Bruce Schneier, to talk about his book Liars and Outliers: Enabling the Trust Society Needs to Survive. And anthropologist/blogger Greg Laden returns to discuss speculation about cognitive limits on the use of social networks.

For more on the debate between Bruce Schneier and Sam Harris over the effectiveness of profiling in airport security, check out Harris’ essay, Schneier’s response, and the resulting debate.