Why Is Google Asking for My Passphrase?

Passphrases in a Nutshell

The sync passphrase only encrypts the data stored on the Google servers, and primarily works as a security measure to stop your Google Account information from being accessed if a third-party app goes rogue.

Why is Google asking me for a passphrase?

If there's suspicious activity in your Google Account or we detect that your password has been stolen, we may ask you to change your password. By changing your password, you help make sure that only you can use your account.

How do I find my Google passphrase?

The passphrase will be your Google account password. If you've changed your Google account password after setting up sync & encryption, the passphrase will still be the old password.