Major data breaches often make headlines, but are often forgotten about when they become yesterday's news. As a way to allow security experts to analyse past data leaks, anonymous users have gathered and stored databases with millions of records made available for easy online access.
These data repositories serve as a "big part of the reason why, week after week, the full scale of past hacks is gradually beginning to surface," according to a report.
Leakbase, for example, has made over 68 million passwords and hashtags available belonging to users from a 2012 Dropbox breach. That data, if in the wrong hands, can also still be used for illicit purposes, such as spam attacks.