![]() Enterprise admins can control this feature using the PasswordLeakDetectionEnabled policy setting. You can control this feature in the “ Sync and Google Services” section of Chrome Settings. If they have been compromised, Chrome will tell you, and we strongly encourage you to change your password. Only you discover if your username and password have been compromised.In order to make this computation more efficient, Chrome sends a 3-byte SHA256 hash prefix of your username to reduce the scale of the data joined from 4 billion records down to 250 records, while still ensuring your username remains anonymous. This allows us to compare your encrypted username and password with all of the encrypted breached usernames and passwords, without revealing your username and password, or revealing any information about any other users’ usernames and passwords. In order to determine if your username and password appears in any breach, we use a technique called private set intersection with blinding that involves multiple layers of encryption.No one, including Google, is able to derive your username or password from this encrypted copy. When you sign in to a website, Chrome will send a hashed copy of your username and password to Google encrypted with a secret key only known to Chrome.Whenever Google discovers a username and password exposed by another company’s data breach, we store a hashed and encrypted copy of the data on our servers with a secret key known only to Google.
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