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Journalist Brian Krebs spends time in the dark areas of the Internet, where hackers steal data off credit cards and sell the information in online underground stores. Krebs has learned computer code and how to get onto black market websites and cybercrime networks. iStockphoto hide caption

itoggle caption iStockphoto

By hijacking a user's computer, "bad" bots make it look as if she visits a website often, thus making the site more valuable to advertisers. iStockphoto hide caption

itoggle caption iStockphoto

Military contractor Raytheon is marketing its employee surveillance software to smaller companies that handle big data. Raytheon hide caption

itoggle caption Raytheon

Facebook says that starting soon, ad targeting will "include information from some of the websites and apps you use," making ads more relevant to users' interests. iStockphoto hide caption

itoggle caption iStockphoto

Participants hold up images of former NSA analyst Edward Snowden at an April conference on the future of Internet governance in Sao Paulo, Brazil. Andre Penner/AP hide caption

itoggle caption Andre Penner/AP

Lt. Travis St. Pierre, of the New Orleans Police Department, shows off a body-worn camera during a press conference in January. Brett Duke/The Times-Picayune/Landov hide caption

itoggle caption Brett Duke/The Times-Picayune/Landov

Legal experts say it's too soon to know the impact of a European court ruling that will require Google to remove some links upon request. Virginia Mayo/AP hide caption

itoggle caption Virginia Mayo/AP

Mark Zuckerberg kicks off the annual Facebook developers conference in San Francisco on Wednesday. Justin Sullivan/Getty Images hide caption

itoggle caption Justin Sullivan/Getty Images