On Sun, Apr 11, 2010 at 12:55:48PM +0200, Michael G Schwern wrote:
>
> I don't think credit card companies live in the same universe we do.  
> Take Verified By Visa.  Its basically a XSS exploit.  Worse, it wants me 
> to make up a secure password to associated with my credit card.  The 
> password MUST be between 6 and 10 characters.  If I forget the password, 
> I can just make up a new one.

And in the UK it shifts fraud liability to the cardholder (because 
it *must* have been you, it required you to input your password and 
everything!)[1]

Most banks make a 3D-Secure implementation mandatory. I can't get 
Mastercard Securecode disabled on my CC for example. I did manage to get 
another 3DS implementation disabled on one of my debit cards, however.

HSBC made the bold claim that "since we introduced 3DS, we haven't had a 
single case of fraud". You can instead read that as "since we introduced 
3DS, we've penalised the cardholder every time someone defrauds them 
rather than actually sorting the problem out and prosecuting the 
bastards involved"

Simplest 3DS attack:
1. Take your grandma's CC and shop online with it
2. Since she doesn't shop online, register her card for 3DS
3. Now you know your grandma's 3DS information and yet she doesn't
4. Your grandma is liable

Hardly seems fair on Grandma does it? Now replace 'Grandma' with upper 
management at Visa / Mastercard and you have a conference. And 
potentially a jail cell, but go out with a bang.

See also chip-and-pin, which also shifts liability in Britain and is the 
reason all of my cards are chip and signature (where liability is still 
on the bank). It's somewhat annoying being unable to use a cashpoint, 
but I have a cunning plan to open another bank account with a chip and 
pin card and shift a small amount of money to it each week via standing 
order.


--James

[1] May not actually be true, but has been upheld by a UK court 
nonetheless

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