On Mon, 4 May 2020, John Jason Jordan wrote:
I can access thousands of dollars of my cash at an ATM with only
a four number PIN; why does Facebook think it needs my phone number and
that my phone can display text messages.
That's not quite true. You need possession of your card as well as
knowledge of your PIN.
The "something you have plus something you know" scheme is widely used
and is typically the baseline for two-facter authentication.
Hence the reliance on something like a phone. It's possible to lose
possesion of your phone, and it's possible to lose possession of your
password, but it's far less likely you'd lose both.
--
Paul Heinlein
heinl...@madboa.com
45°38' N, 122°6' W
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