Dating and pornography company Friend Finder Network has been hacked, revealing the personal data of more than 400 million users.

The breach, revealed by Leaked Source on Sunday, is one of the largest leaks of all time, dwarfing last year’s infamous Ashley Madison infidelity website hack.

It’s the second time the network’s site, Adult Friend Finder, has been hacked in two years. And when considered in the light of the Ashley Madison leak, will no doubt force online daters to reevaluate the safety of their information.

According to Leaked Source, which calls itself a “breach notification website”, the hack encompasses ‘casual hookup’ site Adult Friend Finder, which boasts a massive 339 million accounts, and live-sex camera site Cams.com, which has 62 million accounts.

Hackers published the details of about 33 million Ashley Madison users last year.

The hack occurred last month, and revealed the passwords, browsing history and specific visiting times of millions of users.

It also included the lesser-used sites Penthouse.com (seven million accounts), Stripshow.com, iCams.com and another unnamed site (2.5 million accounts combined).

Adult Friend Finder touts itself as “the world’s largest sex and swinger community”, helping users “hook up, find sex or meet someone hot”.

The Friend Finder Network did not respond to requests for comment from The New Daily, but vice president and senior counsel Diana Ballou told tech site ZDNet the company had been made aware of “vulnerabilities” in the system.

“Immediately upon learning this information, we took several steps to review the situation and bring in the right external partners to support our investigation,” she said, not confirming whether there had actually been a mass leak.

There is also the issue of the seven million Penthouse.com user accounts, which should have been wiped from Friend Finder’s books given they sold the site to Penthouse Global Media earlier this year.

In 2015, extortionists took advantage of the massive Ashley Madison leak. Photo: Getty

Penthouse Global Media told the site they were aware of the hack, but had not yet received a detailed brief from Friend Finder.

Hack mirrors Ashley Madison

The Adult Friend Finder hack resembles the leaking of 33 million Ashley Madison accounts in 2015 not only for revealing intimate sexual information presumably wanted kept private by users, but also in revealing that dating sites often fail to purge deleted accounts.

According to Leaked Source, the hack includes 15 million accounts that users had deleted, but had not been wiped from the massive database.

Similarly, Ashley Madison – whose tagline was “Life is short, have an affair” – had promised to permanently delete user information that resulted in numerous cases of blackmail, divorces and even suicides after the explosive 2015 leak.

Fortunately for Adult Friend Finder users, the hack doesn’t include customers’ sexual preferences (like the Ashley Madison leak), but does reveal whether they are a VIP member and if they paid for certain products, according to Leaked Source.

The breach site chastised Adult Friend Finder for using insecure password storage methods.