Three US praise firms warn of safety break

Visa, MasterCard and Discover have warned that credit card holders personal information could be at risk after a security breach. None of the three companies, which are the three of the largest credit card processors, would confirm how many customers were affected. Visa echoed MasterCard’s statement, emphasizing that its customers are not responsible for fraudulent purchases.

Security blog KrebsOnSecurity, which first reported the story, said industry sources supposed more than 10 million cards, may have been compromised. Visa and Mastercard, also used for debit cards of major US banks, said they had notified banks of the breach. According to Gartner analyst Avivah Litan she believed the breach was related to a taxi garage in New York City.