Why wouldn’t the government disclose a cybersecurity vulnerability? According to a White House blog post, it could mean foregoing “an opportunity to collect crucial intelligence that could thwart a terrorist attack, stop the theft of our nation’s intellectual property, or even discover more dangerous vulnerabilities that are being used by hackers or other adversaries to exploit our networks,” writes White House cybersecurity coordinator Michael Daniel.

"Heartbleed" is a catchy name for a cyber vulnerability, but how exactly does it work, and how can you (and your enterprise's employees) be better protected against it?