100,000 Amex, MasterCard, Visa holders affected ‘Unauthorized intruder’ breached U.S. computers. Tens of thousands of Canadian credit card holders should be on the lookout for suspicious account activity after Visa, MasterCard and American Express confirmed that an “unauthorized intruder” had accessed a third-party computer system holding information on up to 8 million accounts. Representatives from the three credit card companies could not say whether it was a hacker or an insider who gained access to the sensitive information, including data from more than 100,000 Canadian-issued cards. The data resided with an American firm that processes card transactions for retailers and other merchants doing business through the Internet. The name of this firm was not disclosed, but the credit card companies said they are working with U.S. authorities, including the Federal Bureau of Investigation, to track down the culprit and determine the extent of the breach. “If there’s something that doesn’t seem right, you should be contacting your bank about that,” warned Terrie Tweddle, a spokesperson for Visa’s operations in Canada. Full Story
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