Warning! 32 Million Twitter Passwords May Have Been Hacked and Leaked

The world came to know about massive data breaches in some of the most popular social media websites including LinkedIn, MySpace, Tumblr, Fling, and VK.com when an unknown Russian hacker published the data dumps for sale on the underground black marketplace.

However, these are only data breaches that have been publicly disclosed by the hacker.

I wonder how much more stolen data sets this