Level 33
The recently discovered tranches of stolen login credentials freely floating around the internet total 2.2 billion records

Two weeks ago, reports that a vast compilation of stolen access credentials was being widely circulated, not only in the internet’s dark recesses, made the headlines. Before long, additional reports began to pour in that this trove of data, dubbed Collection #1, was far from the only massive and readily available aggregation of stolen logins.

Security journalist Brian Krebs, for one, wrote that Collection #1, which comprises 773 million login names and associated passwords, was just a portion of a far larger stash of stolen or leaked credentials that was circulating on hacking forums and via torrents. Besides, by some accounts at least a portion of the latter caches contains more recent data, thus potentially posing greater risks for users. Enter Collections #2 through #5, so nicknamed by their creator(s).

Research by Germany’s Hasso Plattner Institute (HPI) has shed some more light on the data sets. HPI found that the number of purloined login credentials that have been cobbled together into the five tranches totals 2.2 billion, reads the institute’s press release (in German).

Importantly, the institute operates a service that is similar to Troy Hunt’s Have I Been Pwned (HIBP) site. Unlike HIBP (as of the day of writing, anyway), the Identity Leak Checker includes data from all five caches in their entirety, and then some – 8.16 billion data records.