A group of hackers is attempting to hold Domino’s Pizza to ransom after it snatched 600,000 customers records from the company’s French and Belgian databases.
Rex Mundi demanded €30,000 from the pizza company not to publish the data, taking to Twitter to publicise its actions.
"We notified Domino’s France about our hack on Tuesday," the hackers said. "It took them four days to notify their customers. And they still haven’t contacted us."
They added that they would begin releasing the data on Monday if Domino’s did not respond.
A spokesperson from the pizza firm said that the data had been limited to email addresses, names, street addresses, passwords and phone numbers, but had not included financial information.
"Domino’s Pizza uses an encryption system for trade data," the company added. "However, the hackers who attacked us are seasoned professionals and it is likely that they could decode the encryption system, including passwords.
"We value customers’ privacy and we immediately took appropriate steps to close the vulnerability and are continuing to monitor the situation closely. The relevant teams are working closely with local police in relation to this matter."
Rex Mundi, whose name is the Latin for "king of the world", has a track record of holding companies to ransom, having previously attacked online lender AmeriCash Advance, the Franco-Belgian bank Dexia and the Belgian telecoms company VOO.
Most recently it released the names of 12,000 customers of Belgian webhosting firm AlfaHosting, having last year leaked 6,000 records from Numericable, a French telecoms company.
