How Does Google Know My Password Is Compromised?

To check whether you have any compromised passwords, Chrome sends a copy of your usernames and passwords to Google using a special form of encryption. This lets Google check them against lists of credentials known to be compromised, but Google cannot derive your username or password from this encrypted copy.

What does it mean when Google says my passwords are compromised?

A Google Chrome password breach warning saying, “A data breach on a site or app exposed your password,” can strike fear in your heart. Chrome's built-in password manager does this to alert you to a recent breach in which sensitive data such as your password may have been exposed.

Does Chrome check for compromised passwords?

Chrome and other Chromium derivatives, like Microsoft Edge, also offer the ability to check for compromised passwords. The browser can scan your saved passwords to see if any of them have leaked in security breaches.