General > General Technical Chat

Credit Card, Bank Card NFC. The most useless function every invented

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m k:
Here cash is the law.
Though, for decades, some have been rejecting it, like electricity company.

Magnet stripe for money is also illegal.
Skimming news have disappeared, so are stripes.

I find myself being more concerned that bad guys are rooting the system, or the phone.
But I'm far from everything and possibly paranoid.

twospoons:

--- Quote from: thm_w on March 02, 2022, 02:21:41 am ---
The thing is, for the ones I've used, there is no way you as an end user can take it apart to fix any pins.
As soon as you look at it the wrong way, its going to brick itself and you have to send back to the manufacturer to repair it and re-load whatever software keys.
...

--- End quote ---

As a contractor currently working for a company making payment terminals I can confirm the extreme lengths we go to to prevent unauthorised tampering. There are tamper switches and security grids everywhere. As soon as any kind of intrusion is detected the thing will wipe its cryptographic keys, rendering it useless. 

The biggest risk, around here anyway, is some low-life nicking the NFC card and running around using it for transactions below the limit requiring a PIN (here its $80).

I hear the small retailers don't like them because the banks charge extra for NFC transactions.  That may be different elsewhere in the world.

NiHaoMike:

--- Quote from: twospoons on March 07, 2022, 08:46:17 pm ---As a contractor currently working for a company making payment terminals I can confirm the extreme lengths we go to to prevent unauthorised tampering. There are tamper switches and security grids everywhere. As soon as any kind of intrusion is detected the thing will wipe its cryptographic keys, rendering it useless. 

--- End quote ---

Berni:
Everyone seams to have higher limits for contactless card PIN entry. Over here you can only do up to 25€ without a pin and something like every 10 pinless payments you have to enter a pin anyway.

What was an issue at some point with contactless bank cards is that the non encrypted memory area had a fair bit of personal information inside of it. This is data that any RFID reader will spit out if you try to read a bank card. Later on they stopped putting the credit card owners details in there.

Haenk:
I think the "risk" part of contactless payment can be neglected - the PIN-less transactions are limited to AFAIK a combined 150 EUR.

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