The email that users received contained a link to a Dropbox help topic, where the company explained to users the reasons why they were taking these steps.
Dropbox learned of security breach dating back to mid-2012
As Dropbox wrote, the company recently became aware of the presence of some old Dropbox user details online. This data included email addresses, and hashed & salted passwords.
After analyzing the data, Dropbox believes the breach occurred in mid-2012, and as such, is asking all users that registered on its site before mid-2012 to reset their account passwords.
Only users that registered before that date and those who have not reset their password since then were notified via email.
Dropbox investigated the breach in 2012 but didn't detect its ...
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