More than 3.1 million account names with encrypted security questions, 2.9 million usernames, and nearly 90,000 account usernames with bank account details were stolen.

Betfair said it did not inform its registered customers of the attack

The betting group said it had contacted the Australian Federal Police and German authorities over the attack

73% of consumers surveyed by MasterCard state that enhanced security would influence their decision to purchase online. MasterCard SecureCode encourages online shopping.

31% of consumers surveyed by MasterCard are concerned that their payment card number will be intercepted by hackers.

MasterCard SecureCode makes accepting cards from other countries easier and less risky – helping electronic retailers move into new markets.