A branch of GCHQ, Britain’s intelligence and security service, is investigating one of the UK’s biggest data breaches at a single firm, involving unauthorised access to 5.9 million Dixons Carphone customers’ cards.
The National Cyber Security Centre said it was working alongside the retailer and other agencies after the attack, which also involved unauthorised access to 1.2m personal records of Dixons Carphone customers.
“Anyone concerned about fraud or lost data should contact Action Fraud and we recommend that people are vigilant against any suspicious activity on their bank accounts,” the NCSC said.
Dixons Carphone said it had identified the massive data breach while it was reviewing its systems and data. The consumer electronics firm said there was an attempt to compromise the cards in a processing system at Currys PC World and Dixons Travel, but said there was no evidence of fraud as a result of the