Cyberattack hits MasterCard, Visa corporate websites

12/9/2010 | CNNMoney

An apparent cyberattack made the corporate websites of MasterCard and Visa inaccessible throughout the day Wednesday. The attacks were purported to be by backers of WikiLeaks in response to moves against the site. "The issue appears to be the result of a concentrated effort to flood our corporate website with traffic and slow access," said James Issokson, a spokesman for MasterCard. He said the attack did not affect financial security or credit card use.

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