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A comment on Largest Bitcoin mixer, Bitmixer.io, closes down. Parent comment

Re:Largest Bitcoin mixer, Bitmixer.io, closes down by angus-prune on Tuesday July 25, 2017 @12:35PM (#14849168)
How does 2fa work in practice for credit card payments?
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Re:Largest Bitcoin mixer, Bitmixer.io, closes down by Symbiote on Tuesday July 25, 2017 @01:42PM (#14850010)
Both my Danish and British accounts send an SMS for some purchases, usually only larger ones. I have to type it into a box on a form.

They used to use a password, but that risks people putting their bank password into some dodgy shopping site.

VISA's implementation: https://www.visaeurope.com/making-payments/verified-by-visa/

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Re:Largest Bitcoin mixer, Bitmixer.io, closes down by Styn on Friday July 28, 2017 @03:44AM (#14872668)
Bit of a late reply but almost all companies use something called a digipass, you insert your card and input a challenge code and your pin. https://i.imgur.com/10OChcv.jpg
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