Can you further clarify how Face ID uses the master password?
On this page https://support.1password.com/face-id-security/ there is the statement:
_When you turn on Face ID, 1Password stores in the iOS Keychain an obfuscated version of a secret that is equivalent to your account password.
Can you clarify what that means? My understanding is you don't store the master password, but it sounds like you are storing the equivalent of the master password. Is that correct? It sounds like there is something equivalent to the master password that only you and Apple have access to on the phone. Can you explain further and, in particular, how this is meaningfully different from 1password knowing the master password?
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