Mashable has a list of sites and services and actions you should take in the wake of the security flaw called Heartbleed. Here’s a good explanation of the problem in the New Yorker.
An encryption flaw called the Heartbleed bug is already being called one of the biggest security threats the Internet has ever seen. The bug has affected many popular websites and services — ones you might use every day, like Gmail and Facebook — and could have quietly exposed your sensitive account information (such as passwords and credit card numbers) over the past two years.
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