@quitit 12d
It seems like a great idea if the use case is that its silently being run in the background to alert the operator/system of a possible breach.

While I think there isn't much ease in acquiring the AI voice with "just 4 minutes" of what was likely clear and unambiguous recording, I still don't think biometrics are good as passwords, they're good as shortcuts -after- having already provided the correct password for a single session.

This also means the voice can be gathered passively from earlier phone calls, and generally might be a good idea for government services/banks to implement regardless.