The Heartbleed bug is a security hole discovered in OpenSSL, widely used network software that encrypts the sensitive data you input into many popular websites. The flaw allows hackers to steal data directly from the memory chips of servers all over the world, and has been in existence for roughly two years. Jean Taggart, a Senior Security Researcher at Malwarebytes, which makes popular anti-malware software, described it as an easy way for crooks to invisibly sweep up your data.
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