An anonymous reader notes this report from Channel 4 News that Adult FriendFinder, one of the largest dating sites in the world, has suffered a database breach that revealed personal information for 3.9 million of its users
. The leaked data includes email addresses, IP addresses, birth dates, postal codes, sexual preferences, and information indicating which of them are seeking extramarital affairs. There even seems to be data from accounts that were supposedly deleted. Channel 4 saw evidence that there were plans for a spam campaign against these users, and others are worried that a blackmail campaign will follow. "Where you've got names, dates of birth, ZIP codes, then that provides an opportunity to actually target specific individuals whether they be in government or healthcare for example, so you can profile that person and send more targeted blackmail-type emails," said cybercrime specialist Charlie McMurdy.