Visa and MasterCard have been warning banks about a compromise of a US credit-cards processor that could have affected over ten million people, according to KrebsonSecurity.com.
The US-based processor was compromised between 21 January and 25 February, 2012, and both Track 1 and Track 2 data was stolen — enough data to counterfeit credit cards, security journalist Brian Krebs posted on Friday.
ZDNet UK is waiting for a response from the companies about possible effects on UK and European credit card holders.
Update: MasterCard has confirmed that a data processor is under investigation.
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