Re: The problem...
'certain authorities' may have all the above already
It's not just GCHQ who have all that info. Your bank knows all of that.
Previous devices - Cookies
Home address - obviously they know that
Audio match - if you've ever used phone banking
Video match - if you've ever used an ATM
And realistically, your bank are the only people who need this level of login security. You may be equally interested in securing your email but that's your problem not the email provider's so the provider can leave it to you to select good passwords and keep them secret. The bank can't rely on that because it's them who are on the hook for fraud.
Biting the hand that feeds IT
