Have I Been Pwned? (HIBP) is a website that allows internet users to check if their personal data has been compromised by data breaches. The service collects and analyzes dozens of database dumps and pastes containing information about hundreds of millions of leaked accounts, and allows users to search for their own information by entering their username or email address. Users can also sign up to be notified if their email address appears in future dumps. The site has been widely touted as a valuable resource for internet users wishing to protect their own security and privacy. Have I Been Pwned? is run by security expert Troy Hunt.