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25379 Problem 2 In June 2011, Citigroup disclosed a data breach within their credit card operation, affecting approximately 210,000 or 1% of their customers' accounts. Sources Last week, the company said a total of 360,083 North American Citigroup credit card accounts were affected by the cyber attack in May, the latest in a spate of attacks in recent months targeting high-profile companies like Sony, Google Inc and Lockheed Martin. http://www.reuters.com/article/2011/06/28/us-citigroup-idUSTRE75R7G220110628 (Reuters) - Citigroup, the third-largest U.S. bank by assets, has told government officials that about 3,400 of the customers whose credit-card information was hacked have suffered about $2.7 million in losses, the Wall Street Journal reported. http://www.reuters.com/article/2011/06/28/us-citigroup-idUSTRE75R7G220110628 The exposed account information included names, account numbers, email addresses, and contact details http://www.informationweek