According to German researchers at the Hasso Plattner Institute (HPI), more than 2.2 billion usernames and passwords collected from older security breaches are available to download on the dark web, a part of the internet without search engine indexing.
The data, referred to as Collection #2 through Collection #5, came from breaches that happened years ago. It’s one of the largest compilations of stolen credentials and follows the 773 million email addresses released in Collection #1 in early January.
Use HPI’s search tool to see if your email address has been compromised.