The 10 Biggest Security Stories Of 2011

Sony suffered two major security hacks this year that exposed millions of customers to cyber-criminals. The first occurred in April, compromising up to 70 million customer records connected to the Sony's PlayStation Network and Qriocity services, which had to be taken offline temporarily. Stolen information included user names, passwords, online IDs, customer addresses and email addresses. Sony said profile data may also have been taken, including purchase history, billing addresses and answers to security questions. While the company didn't believe that credit card data was stolen, it couldn't rule out the possibility.

The second attack occurred two months later when hackers broke into the computer networks of Sony Pictures and stole personally identifying information from 1 million customers. The hacker group LutzSec claimed responsibility for the breach.

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