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Hackers have stolen the details of more than eight million British accounts belonging to the world’s most popular adult dating and swingers site.

Over 412million members of the Friend Finder Networks are victims of the largest ever data breach , according to monitoring firm LeakedSource.

The network includes the website AdultFriendFinder.co.uk.

The hack exposed members’ email addresses, passwords, dates of last visits, browser information, IP addresses and site membership status.

The American-owned Friend Finder Networks operates ‘one of the world’s largest sex hookup’ sites Adult Friend Finder.

(Image: Getty)

It has ‘over 40 million members’ and over 339 million accounts.

Its British site boasts: “With so many sexy members looking for sex with adult friends, AdultFriendfinder.co.uk is the place to find adult no strings fun.

“Hook up easily tonight if you’re looking for an adult friend, swinging partner or just a casual sex date.

“Search our member database for adult friends, swingers, one night stands, casual sex, adult chat, and local sex and you’ll find lots of potential partners looking to get off with no strings attached.

“Adult FriendFinder has helped millions of people find traditional partners, swinger groups, threesomes, and a variety of other alternative partners.”

Although passwords were encrypted, hacking site LeakedSource managed to crack 99% of them as they were insecure.

(Image: Getty)

One UK member, a father-of-two from Goole, East Yorkshire, told how he now fears his details will be among those now available.

The 37-year-old said: “I joined after I separated from my wife.

“I was going through a tough time and thought it would be an easy way to fulfil my needs without having to commit.

“I didn’t actually meet anyone through it but I did fill out the questionnaire in full.

“It’s worrying to think that information is now available to others now.”

Members, who pay up to £15 per month for gold membership, can detail their highly personal sexual preferences.

It is estimated of the 8.6 million UK accounts, three million are still active.

The breach represents 20 years of customer data.

The company, based in Baco Raton, Florida, also runs live sex camera site Cams.com, which has over 62 million accounts.

(Image: Getty)

It also runs, adult site Penthouse.com, which has over seven million accounts, as well as stripshow.com and iCams.com.

Vice president and senior counsel, Diana Ballou, said: “FriendFinder has received a number of reports regarding potential security vulnerabilities from a variety of sources.

“While a number of these claims proved to be false extortion attempts, we did identify and fix a vulnerability that was related to the ability to access source code through an injection vulnerability.”

Ballou said Friend Finder Networks brought in outside help to investigate the hack and would update customers as the probe continued.

However, she would not confirm the data breach.

The breach, the second in two years, is the biggest since the 2013 leak of 359 million MySpace users’ details.

Last year 3.9 million Adult FriendFinder members had their details leaked, including those who told the site to delete their accounts.

Of those 26,939 were found to have UK email addresses with a ratio of one woman to every 16 men.

The breach also comes 17 months after hackers threatened to expose the 1.2 m Brits who belonged to extra marital affair website Ashley Madison.

And it's not the first time

(Image: Getty)

Hackers previously threatened to expose the secrets of 1.2 million Brits who belonged to extramarital affair website Ashley Madison .

They said they would release the information if the company refused to shut the site down.

The dating network, which ‘guarantees’ people seeking to cheat on their spouses they will ‘find someone’ was breached in July last year.

A group calling itself The Impact Team issued an ultimatum to Canadian owner Avid Life Media (ALM).

The group said that unless they took Ashley Madison down its 37 million users’ most intimate details would be published.

These included names, ages, addresses, credit card information and even sexual fantasies.

British victims were later targeted by blackmailers threatening to reveal all to their unsuspecting partners unless they were paid.

In America, two men took their lives after their information was made public.

The owners improved security, allowing the site to continue trading.

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