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submitted 11 months ago by chevy9294@monero.town to c/android@lemmy.world

Hi, I want to pay with online prepaid visa in person. I could add it to Google Pay, but Google Pay doesn't support NFC payments on GrapheneOS. Do you know any other app that lrts you do that?

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[-] JackGreenEarth@lemm.ee -5 points 11 months ago

Why hasn't someone made a FOSS NFC payments app yet? Any bored Android FOSS developers, please make this your next project.

[-] cttttt@lemmy.world 6 points 11 months ago

It's more down to trust and attestation than a technical implementation. Whoever makes an NFC payment system needs to prove to payment processors that the chain of software and hardware from the payment terminal to whatever proves you're the account holder (a card or a phone) can be identified. And, separately, the implementation needs to be audited.

This may sound like they're trying to make this horrible walled garden on the surface, but bank users expect their money to not get stolen. And if it is, they expect the bank to make that problem disappear. The bank can only provide these assurances if they control everything.

This is why they use hardware attestation and a chain of trust all the way through to the OS to identify the specific implementation of an NFC payment system. They want to know they can go after whoever created the buggy NFC payment implementation to recover the money or to least stop partnering with them.

Not a lot of FOSS developers would go through the trouble.

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this post was submitted on 23 Nov 2023
42 points (95.7% liked)

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