In Pictures: The biggest Internet security challenges of 2013

From the attack on privacy and Cryptolocker to Eric Snowden and the NSA, it's been a challenging year

Perhaps more than in recent history, Internet security issues went global this year especially with the revelations that the United States electronically spied on just about everyone. But there have been other significant ups and downs as well. Here we take a look at some of the important Internet security stories of the year.

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