What are some online dating services

Continue Reading Online dating profiles should include honest information about the person's appearance, age, occupation and dating status.

Individuals should disclose if they are single, married, widowed, separated or divorced to avoid misleading interested parties.

An overview of interests and social activities the individual enjoys helps pinpoint matches with the same interests.

An online dating profile should show off the individual's personality, include a catchy headline or tagline and provide an overview of the ideal partner.

In addition to sexual orientation, the data allegedly revealed included e-mail addresses, usernames, dates of birth, postal codes, the unique Internet addresses associated with users' computers and whether members were looking for extramarital affairs.

Even being revealed as a member of Adult Friend Finder might be embarrassment enough for some: The site is, as its name suggests, "adult" in nature. Penthouse Media Group acquired it along with the rest of its network, which also includes less risque sites aimed at religious and senior daters among others, back in 2007.

But it's just the latest sign that Internet users looking for love online -- or just hoping to hook up -- face privacy and security risks they might not expect.

The hack, first reported on by British outlet Channel 4 News last week, reportedly resulted in the information of nearly 4 million members of Adult Friend Finder leaking onto an online forum frequented by hackers.

Factors like communication patterns, problem-solving skills and sexual compatibility are "crucial for predicting the success or failure of relationships" but can't be captured in an algorithm employed pre-meeting (yet).

Mingle2 is a membership service of which users pay to be a part.

It was originally a service called Just Say Hi, but the site transitioned to Mingle2 in 2008 and now works with many populations of singles.

While chatting online pre-date might seem like a great way to vet matches, there's a "tipping point" at which all of that information gathering might be hurting your love life, according to a 2014 study.

The sexual orientations and personal details of millions of Internet users may have been exposed in an alleged breach of a social networking site aimed at intimate encounters.

It works with special algorithms that match users with potential dates.

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