Report: Visa and MasterCard warn of 'massive' breach

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.