Friend Finder Networks did not immediately respond to Business Insider's request for comment.
But it told ZDNet, which also verified a sample of the data, that "over the past several weeks, Friend Finder has received a number of reports regarding potential security vulnerabilities from a variety of sources.
That is why if a woman wants to place her profile on Romance Compass.com, she needs to visit our partner's office and provide a copy of her ID.
That way, if one of your accounts is compromised, your others aren't too — because hackers often use user logins taken from one breach and try them on other sites.
It's also good practice to enable two-factor authentication, where available.
This isn't even the first time Adult Friend Finder has been hacked.
Back in May 2015, news broke that it was breached, albeit on a smaller scale — 3.9 million user accounts were circulating online.
The 412 million accounts go back 20 years, it says, and the lion's share comes from Adult Friend Finder — almost 340 million.
Another 63 million come from adult webcam site Cams.com, 7 million come from adult magazine Penthouse.com, and over a million apiece from and i
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