One of the world's leading online gambling websites, Betfair, admitted recently that the personal account details of more than 3 million of its players was hacked in early 2010. Now, Betfair's Director of Security, Sean Catlett, has resigned.

The security breach occurred between March 28, 2010 and April 9, 2010. Approximately 3 million account usernames with encrypted security questions were stolen. Nearly all of those included addresses and nearly 90,000 included bank details.  

The theft was not detected until a server malfunction was discovered a month later. It was only when maintenance was required that Betfair learned at least nine of its UK servers had been compromised.

The hackers were based in Cambodia.

Betfair said that all data was recovered without damage and appropriate measures have been taken to ensure stolen details cannot be used.