Pavel Durov, founder of the Russian social network VKontakte, was home alone in his apartment in St. Petersburg on a weekend when a contingent of men in camouflage uniforms knocked violently on his door.
Facebook has launched ThreatExchange, a social network of sorts designed to allow companies to share information and intelligence about cyberthreats. The move is the latest example in how an age of cooperation may be emerging as companies increasingly battle cyberattacks of various stripes.
