from the my-password-is-trustno1 dept.
wiredmikey writes "Over 250,000 user names, email addresses, and passwords used for social networking sites can easily be found online. A study of the data collected showed that 75 percent of social networking username and password samples collected online were identical to those used for email accounts. The password data was gathered from blogs, torrents, online collaboration services and other sources. It was found that 43 percent of the data was leaked from online collaboration tools while 21 percent of data was leaked from blog postings. Meanwhile, torrents and users of other social hubs were responsible for leaking 10 percent and 18 percent of user data respectively...."
We warn the reader in advance that the proof presented here depends on a
clever but highly unmotivated trick.
-- Howard Anton, "Elementary Linear Algebra"