Worldwide spending on security infrastructure rose to $60 billion in 2012, up 8.4 percent from $55 billion in 2011, Gartner says. Security experts offer five tips for enhancing security that don’t cost a lot of cash at all. Experts: Patch security holes and identify vulnerabilities; keep up with BYOD. The most successful attacks had been identified and fixed by vendors years earlier, experts say. Nine out of 10 big companies lacked defined security plans and security plans, expert says.”]