Have I Been Pwned (HIBP) is a website that allows users to search and find out if an email address’s password has been compromised by data breaches. The service is a popular and commonly-used tool in IT security.
As a database service compiled from known leak sites, the service allows users to quickly check to see if a particular email account has been compromised by a data breach. The database is compiled from crawls of a number of websites and database dumps. Some of these sites are believed to purchase account information from hackers.
HIBP was created after a large data breach at Adobe in October 2013. Since the site’s creation, HIBP has become legitimized as a security tool by tech-savvy users to keep their information safe. Corporations trying to assist users after data breaches also sometimes offer HIBP links in notification emails.
Have I Been Pwned was created and independently run by Troy Hunt, a Microsoft Regional Director. As of June 2018, it was announced that HIBP had partnered with Mozilla Firefox and 1Password to integrate the service into new products.