According to Troy Hunt the data dump which he dubbed Collection #1 contains more than 87GB of data spread over 12,000 separate files. As you can imagine it does not contain the information of just one breach, but compiles a whole lot of them – virtually thousands of sources.
In his blog Hunt says that the set of email addresses and passwords totals 2,692,818,238 rows, includes 1,160,253,228 unique combinations of email addresses and passwords and that they seem to be legit: He was able to find his own personal data in there and it’s accurate.
The numbers above are huge and chances that at least one of your accounts was affected as well are pretty big. To find out if that’s really the case you can do the following:
If you see the message “Oh no — pwned!” chances are, that Collection #1 was amongst them.
Your password was in a recent (or not so recent) data breach? Then you should change it immediately by following the below security tips:
If you have trouble coming up with a good, strong, and complex enough password you can always use a good Password Manager to help you out.