The Internet is already a difficult place to maintain privacy and now two security researchers have revealed new ways to spy on Web users via the browser. At a presentation at DEFCON 17, a hacking conference held in Las Vegas last week, the researchers showed a variety of ways to snoop on people online, despite the privacy tools employed by most browsers. Robert Hansen, CEO and founder of the Internet security company SecTheory, and Joshua Abraham, a security consultant for the security company.